I have been asked to design an AV system by some clients who favour Apple products, which i dont have a huge amount of experience with..
I have a pretty good idea of what we need to acheive, but have gone round in circles trying to figure out the best way to make it happen. Any advice or pointers to similar set ups would be great

The project is at a house being built at the moment, so running cabling etc is no problem for us.
What i need to achieve:
- Distributed Audio to 2 zones inside and 1 outside (Possibly a fourth if budget allows, but no more than that)
- Iphone & Ipad control of zones and Itunes library (there will be a Mac Mini in the rack to serve media)
- No wall mounted controllers, the Architect does not want any screens or controllers on the walls, everything must be done from the wifi devices.
- Recessed Speakers only, no position for any amplifier within the rooms, this will need to be rack mounted or in the AV cupboard with the Sky box and other bits.
In addition to the audio, there will be one Apple TV at the home theatre, running its own 5.1 surround sound. I am hoping this can be controlled the same way for audio if they want it.
From what i gather, by having the Airport Extreme as their Wifi Router (10+ items is quite likely) and the Apple TV, and using the Apple Remote app we should be able to get the functionality they want in that room at least. The problem i have run in to comes to how to control and power the three (posisbly four) other zones.
They aren't concerned about having true multiroom distribution, as the areas are quite open plan, and would be playing the same source at the same times,, so having a few Airport Expresses feeding in to auto-on amplifiers might be an option, giving them the option to control the zones all from the same App.
Hardware-wise though this seems a bit wasteful to me, particularly if all the hardware is in the one physical location at the AV cupboard. Most of the other multiroom audio systems i have dealt with have been from a 4,6 or 8 zone amp with wall controllers.
Can anyone comment on using something of that sort in place of the multiple Airport Expresses and Single Zone amps?
I know Russound have an Iphone App that allows control of the multiroom, but seems difficult to integrate with Itunes without changing back to the Apple Remote App..
Everyone I speak to seems to have a different opinion or barrow to push with the hardware, so i would love to get some real world feedback or new directions to look at!
Cheers,
Mike.