Compact Sub Help

Hi All, I'm doing a whole house audio as follows:

4 Zones, each powered via a Sonos Connect Amp.

Zone 1: Great Room 15x30. 100% music, 4.1
Zone 2: Family Room 15x24. 80% music 20% movies, 4.1
Zone 3: Bedroom 13x16. 100% music, 2.1
Zone 4: Outdoor deck/pool. 100% music, 2.0

I plan to purchase Mirage Nanosats for all the indoor satellites. Haven't decided what to buy for outside speakers yet.

My wife does not want big subs anywhere, so I'm looking for the most bang per cubic foot. Price is a concern because the Sonos amps blew the entire budget I thought I had for this project. However, I'm not one to set a budget in stone only to wish I'd done it differently a year from now. Sonos is the only viable option for what I want the system to do, so the budget has grown by at least $1K.

We listen to music mostly at background volume levels, and movies at moderate volume. (Just boring old farts that enjoy music and want a little more punch in our movies)

Current plan is to buy two Nanosat systems, which would give me the 10 satellites I need for Zones 1-3. The cheapest option would be to buy the 5.1 systems ($400 ea.), which would give me two Nanosat subs for Zones 1 & 3, and get a third (better) sub for Zone 2. The other option is to buy the 5.0 systems ($310 ea) and get 3 better subs.

Nanosat S8 subwoofer: -
bass-reflex (ported) design
frequency response: 33-120 Hz
75-watt RMS amplifier
8" down-firing woofer with Ribbed Elliptical Surround™
12-1/4"W x 13-3/4"H x 13-1/2"D
warranty: 1 year
$90 if purchased with the 5.1 system

Other subs I'm looking at:

Definitive Technology Prosub 800 -
bass-reflex (passive radiator) enclosure
8" front firing woofer pressure-coupled to an 8" low bass radiator
built-in 300-watt amplifier
frequency response 20-150 Hz
continuously variable low-pass 40-150 Hz crossover
80 Hz fixed high-pass crossover for speaker-level outputs
10-5/16"W x 12-7/8"H x 16-5/8"D
warranty: 5 years woofer, 3 years amplifier
$400

Mirage Omni S8
bass-reflex (ported) enclosure
100-watt RMS amplifier
8" front-firing woofer with patented Ribbed Elliptical Surround™
frequency response 27-120 (±3dB)
continuously variable 40-120 Hz crossover
unfiltered LFE input
11-11/16"W x 14-11/16"H x 15-3/8"D
warranty: 5 years (1 year for the amp)
$250

Infinity Primus PS38
8" front-firing MMD driver
bass-reflex (ported) cabinet design
150-watt RMS amp
frequency response 35-150 Hz (±3dB)
continuously variable 50-150 Hz crossover
10-5/8"W x 17-3/4"H x 16-3/8"D
weight: 31.7 lbs.
warranty: 5 years speaker, 2 years amplifier
$200

Lava LSP08
Front-firing, front-ported
8" coated cellulose composite
100 watt internal amplifier
Frequency Range, Lowpass: 28 - 250 Hz (+/-3dB) boost: 12dB @ 45Hz
Frequency Range, LFE: 37 - 400 Hz (+/-3dB)
Sensitivity: 200mV @ 100W
Crossover: 46 - 250 Hz continuously variable low pass
Cabinet Dimensions: 15" H 11 1/2" W 13" D
BUT, THE FINE PRINT:
Lava LSP08 powered subwoofer extends the low frequency response of the system below 40Hz, with a low pass frequency response in the range of 37-150 Hz (+/-3 dB) and a 60 - 180 Hz continuously variable low pass crossover. In a surround sound system the LSP08 provides stunning reproduction of the LFE (low frequency effects) channel in the range of 20-380 Hz (+/-3dB). The LSP08 is also incredibly sensitive testing a 130mV at 100W.
NOT SURE WHAT THAT MEANS How can a driver that's rated @ 37Hz also do 20Hz LFE?
$200 -

Question 1:
At low to mid volume levels, is the 33-130Hz Nanosat sub adequate? We are by no means audiophiles; would we really notice much difference between that and the others? I'm mostly wondering about Zone 1 (largest room) with a 75W sub.

Question 2:
We'll want the best sub to go in Zone 2. I've chosen front firing models because it's possible the sub will be relegated to under a built-in computer desk. We have a small down firing computer sub there now, and it gets a little boomy tucked back in the knee hole like that. The only other two possible locations are 1.) a tight corner 8' to the right of the screen, but there's a door on either side so it'll have to be be close to the walls. 2.) 8' directly behind the viewers. Regardless, will non-audiophiles like us discern much difference between these 8" subs? I don't want to waste any money, but if it's worth the extra cost, I'll pay it. As an added bonus, the $400 Prosub 800 is also the smallest.

I apologize for the length of this post, but hopefully it'll give you enough info to help me make a decision. I've spent many hours poring over the threads on this forum, and have enjoyed learning from you all. I'd be grateful for your insights. Thanks!

Well, that's disappointing. Even at lower volume levels, the Nanosats won't do? I'm looking for something small that I can mount high on the walls. We don't want speakers sitting on the floor or on stands, and particularly in Zone 1, there's no good place to do that anyway.

The SB1000 would be great; that's a lot of sub in a 13" box, but out of my budget especially for 2 of them.

Thanks, Jim. I'll keep looking.

Can I split the sub out of the Sonos Connect Amp to two subs with an RCA "Y"?

So many choices...

What's your opinion of the Definitive Technology Pro Sub 60? It's an old model, but there's some out there for around $150.

There's also a ton of Yamaha YST-SW012 subs for cheap. There are so many it makes me wonder if they're junk.

Should I be leery of any 8" sub that publishes specs below 30Hz? If I add the OSD PS88 to your list above, half of them bottom out @ 33-38Hz, and half are 23-25Hz. Is there a thread here that explains what makes a good sub?

This has been an interesting education for me. Ultimately, I’ve learned that I can’t afford what I wanted to accomplish. I would rather look at other options than try to do this and max out my budget, only to be dissatisfied with the result. I’m going to explore another option in a new thread. Thanks for all your help!
http://www.avsforum.com/t/1450610/existing-whole-house-sonos-upgrade