Denon & Russound? Need Help

Need help choosing a receiver. Any help is appreciated.

I'm moving into a new home and installing a 5.1 Surround Sound System, 6 interior rooms of background music and 2 patio speakers. I will be purchasing a new receiver and I'm having trouble deciding between the Denon AVR 2312 or 3312.

This is what I'd like to accomplish. I want the receiver to power a 5.1 system in my living room. Then I have an existing 8 room 4 zone russound abus hub with a-kp keypads. I'll be using this to run 6 rooms of background music and would like to only run one stereo input into the hub from the denon receiver to share all the sources that i'll have hooked into the receiver. I don't mind if it won't play digital through to the russound hub. Then I'll be installing two patio speakers out back and i'd like to power these directly off the receiver's amp to provide them more power since the abus keypads are limited.

So what I'm unsure of is if the 3312 has the ability to run everything listed above or would it be more cost efficient to buy the 2312 and also a 2 channel external amp to power the patio speakers.

Also, if anyone as experience with hooking an abus system to a denon receiver I sure could use the help on how to properly hook them up together.

Thanks

If I hook everything up this way, can all systems share the same source if they're analog?

If I decide to install a 7.1 system do I lose one of the zones on the receiver?

Also, the theater speakers I'm gonna buy are 125w power handling, but they also offer the same model in a 150w version but I didn't want to dish out the extra money. Do you think the 125w speakers would be fine considering that the receivers puts out 125w per channel?

Thanks for all your responses. You have been a big help so far.

Here is a link to the speakers I'm thinking of using.

truaudio.com/products/6/In-Ceiling_Revolve_6_Inch

The Rev6-LCR.2 were the model I'm planning on buying. But if you think the receiver will be too much power for these than maybe I should consider buying the LCR.1s

so then technically I can run a 7.1 & hook up the patio speakers to the powered side of zone 3 and russound to the pre-amp side of zone 3?