Yamms are good receivers, but that receiver goes for $73 dollars on ebay.
www.accessories4less.com
and the
harman Kardon store on ebay
are the best places to get an AVR on a budget IMO. Both have very good service and great prices.
You can get a full 5.1 system for $250 from TSC according to the add to my right. If you don't like it they will pay to ship it back. I suggest seeing if you can get a couple subs.
What are we trying to do here?
Do you want a 2.0 setup? 5.1 what?