There are several brands that tend to be good at that price point. Pioneer, Denon, Marantz, and Yamaha all make good gear. I am currently using a Yamaha surround receiver, and like it very much.
I recommend selecting one of these brands, using features you need or want, ease of use, and price as the determining factors for which of them you get. The last two times I have purchased a surround receiver, I have ended up with Yamaha using this method, but different units can be on sale at different times, so it may or may not turn out to be another brand for you to get the best deal you can. My old one is still in use by a family member; reliability has been excellent in my experience with Yamaha (as well as judging from what people say online).