I've been poking around here for weeks (bad idea, budget has already almost doubled lol) looking into subs for my system. I've got Polk RTI A9's, CSi A6, and F/Xi A6's for surrounds and I'm looking at upgrading my receiver to a Denon X4000. I've attached a diagram of my living room layout, it's a little bigger than 24'x19'x8' or around 3600cuft with hardwood floors. There is a large opening w/ 2 french doors leading into the dining room and kitchen that is probably around 8-10ft. The purple squares are my speakers, the green boxes are possible sub locations with location B as an optional spot for the sub in location A during December when I put a Christmas tree in that spot. The Sub 1 spot has been wired in-wall already. I'm pretty much a novice when it comes to audio, outside of volume and crossover freq, I have no idea about the other knobs on the back of these higher end subs and what they do haha. I'm a technical guy, so I'm hoping once I have more time I can learn about this stuff.
My budget is now around $1000-$1500. I only spent around $1000 for my speakers so I don't want to go to much more than that for sub(s), and if I can get by with staying close to $1000, I'd like to. Right now I'm 90% movies/games and 10% music; but I do like soundtracks, so I'm not sure if listening to a movie OST during the movie falls under music or movies haha. Given the room size and listening habits I'm assuming I should go for ported subs over sealed. So far i've been looking at:
2 x Outlaw LFM1-EX
1 or 2 x PSA XV-15
1 x HSU VTF-15h
1 x Rythmik FV15HP
I can't say 100% but I'm 80% sure I will not be picking up a 2nd sub expensive sub for at least 4-5 years as I'm living in a foreclosure and most of my cash is going into the house itself. Additionally I may be in a different house with a different room at that time as well. I've looked at the build your own kits, and while I think I'd be fine putting them together, I'm worried about rattles and other issues that I may not know how to solve as a novice (they are also seem to be out of stock of almost everything for the next month or 2).
So would I be ok with 1 bigger sub or is the current room big and strange enough to warrant 2 medium subs now? Would 2 XV-15's be worth the extra $400 or so over 2 LFM1-EX's (I've read threads that they are pretty close in output)?
I appreciate any advise and insight!