Sounds like your trying to put together a pretty top notch theater.
I would- without a doubt, reccomend ya look into the B&K ref 50 processor, and Genelec active monitors 206's for the front three and 205's for the rear will be a damn fine setup ,,, but 208's for the front w/ 206's for the rear will be even better. (( or even 210's for the front. - Not cheap speakers but they have their own amps built in for each individual driver and as such they will amaze you at how wicked fast their response, and transients are. Very Very well sutted to being built into cabinets. - and yes they do have in-walls as well.
http://www.genelec.com/ <--- genelec's web site

G' luck - drop me a line in ya have any Q's