Personally, I would go this route with this Yamaha R-N301 receiver. It's $269 and free shipping on Amazon. Rated 150/channel @ 4 ohms. It looks like it also has decent networking features if you're interested in that. I know it's about $70 over your budget, but Yamaha makes a solid product. You could probably find something comparable used for around $200, but you'll have to do the research.http://www.amazon.com/Yamaha-R-N301BL-N ... aha+r-n301
There really are a lot of options, but it all depends on what you want. If you look around, a vintage Pioneer SX-950 would easily drive them as well; those can be found on eBay for around $250 to $350 if you're patient (none now, I checked and the ones there right now are ridiculously expensive). Just a thought if you wanted to have some fun, there's a LOT of power and good sound quality in those vintage receivers. I know it says "85 watts/channel", but the SX-950 will mop the floor in terms of output with modern receivers rated at double that power output.