System advice required for home theatre in my cellar

[moviemike]

I’m about to set up a home cinema in my cellar, can anyone give me some advice on my set-up. I’ve been thinking about getting a Screenplay 4800 (Projector) along with a Pioneer DV-575A (DVD player) and a Denon AVR 1604 (Receiver). I’ve been thinking about the following B&W in-wall speakers: CCM50s in my ceiling (rear), CWM 500s in the wall (front), and a LCR60 (centre channel). I’m very keen on the idea of in-wall/ceiling speakers, but am worried that I’m spending as much on them as I am on the rest of the kit put together! Any advice on this system would be much appreciated. The room is about 12x14 foot - what size screen should I go for? For anyone who’s interested here’s the “before” pic, I’ll post more as the building work starts in October!

[hornydragon]

As you are in swindon, if you fancy listening to some inceiling surround speakers drop me a PM. Just down the M4 also have 5700 on demo in the same room.