Its time to start buying this stuff for our new house. Its a dedicated theatre room.

Im going to run a projector, HD, Amp and possibly wireless speakers.

Right now, looking at what brand of HDMI cable to buy? - so i can tell the sparky to cut in the conjute in the walls. I need about 10-15m

Im planning on running the HDMI to the projector only, and then everything esle running off the amp.

I dont want to go bigger than 7.1 surround.
I dont want to go stupid, on the speakers... What are ppl running on here??
What other benifits can i get from HDMI cabling ??
Anything im missing?