If I was in the market for an AV, I would refer you to Amir's previous review of the Denon AVR X6700H. These are now 5 years old but have good overall performance, and would search for a second hand one and add a power amp.
This is an updated review of the Denon AVR-X6700H. I tested an early production 6700H a few weeks ago and found lower than expected performance. Denon Engineering traced this to a faulty capacitor( or capacitors) used in the initial run of this AVR. I requested an updated unit which the...
www.audiosciencereview.com
Have a look at the Buckeye range of power amps - Daniel will mix and match and you can get 4 channel hypex amps in a single box for US$1,000 comprising 2 x MP502 and 2 x MP252 or 6 channel if required.
Buckeye Amps utilizes the most advanced audio amplifier technologies available. Authorized seller for Hypex and Purifi Class D amplifiers. Based in the US. Free shipping and worldwide service!
www.buckeyeamp.com
With some effort you can put a decent pre/power AV system together for about $2k.