<font color='#000000'>I just ordered a HK 525 receiver ($700) with second zone output and a HK PA400 amp ($400) for powering up to 10 speaker pairs throughout my new house being built.
Check it out if on a budget . HK's can take 4 ohm loads so the Pa4000 can run up to 8 speaker pairs and the 525's rear channels can be set up to run 2 of them, for a total of 10.
I looked into Niles, etc. but with the cost, I felt that this set up for $1100 gave me the best bang for the buck</font>