Whole Apartment Audio ideas using Airplay, TV, Airport Express?

Hi,

My wife and I are buying our first place (one bedroom apartment) and finally I can make some more permanent choices and I can tech out the house in ways I would not have considered when we were renting. I was looking at systems like Sonos but I cant see why I need anything more than what I already have for the most part. I would like to find out if there are "cooler" options than the simple setup I have in mind. Please tell me how I can improve upon this setup.

We already have:

a) 3 flat screen televisions

b) 4 ipads

c) 3 iphones

d) 2 TV's

e) 1 Airport Express

f) 1 Airport Extreme

g) 4 Mac computers

h) One 20TB Drobo NAS device

i) One PS3 (used only for Blueray video)

My basic plan was to keep the main stereo in the living room and connect the TV to my main stereo via digital output.

Keep my secondary audio system in the bedroom and connect the Airport Express to it via analog miniplug.

Get powered in-wall mounts for 4 ipads and put them in the living room (near the couch), in the bedroom (near the bed), in the kitchen and in the bathroom.

In the kitchen I will use a small bluetooth speaker and in the bathroom I will use a bluetooth waterproof shower speaker and stream from the mounted ipads in those rooms.

We mostly use itunes match and Spotify on all devices but also have a huge music and movie collection on the Drobo.

I would just choose a Mac, ipad or iphone and stream to whatever speakers we will be near via Airplay or Bluetooth. The apartment is only 1100 sq ft so distance should be no issue. I will also put some water resistant bluetooth or Airplay speakers on the terrace to stream to at some point.

I would hide the wires in the wall for the ipad mounts and possibly the speakers. The televisions would also connect via analog wire to the stereo systems. Video would come from DVR, TV, PS3, Netflix directly to the TV's or occasionally via Airplay.

The TV's would be in the LR, BR and dining room. I would get one more TV for the dining room TV and occasionally stream to it via Airplay.

We will rarely have more than 2 things streaming at once as there are only 2 of us. Will the Airport Extreme with super fast TWC service suffice without issues?

How can I make this setup better? Do you see any potential problems?

Are there any GREAT sites that have ideas for awesome Mac based home A/V?

Is there a better place to post this?

Thank You,

V