check some reviews first:
http://www.productwiki.com/a-v-receivers/main/range_msrp-hi_540/
Onkyo AVRs get good reviews, but they can get very hot. So I took a look at some Yamahas. I ended up with a Denon, but that was a little pricier (AVR-1910), but is great.
Also, check out some amazon.com...