Some help piecing together a 5.1 surround sound system?

I recently purchased a 55" sony xbr led, and absolutely love it. I got it for around 2700 a while back, when they were on special at best buy. I currently have a sony all in one surround sound kit (around 350 bucks) and it's mediocre, but I want to drop some money and replace it. I also have my computer hooked up, and my ps3 for blurays and gaming. My brother in law gave me a killer sub, so all I really need is a nice receiver, 5.1 speakers, and that's it. ...well, of course speaker wire, speaker stands, etc. I have around 600 bucks to drop on a receiver, center channel, right and left front, and right and left rear. I bought a really expensive onkyo receiver several years back, and it died....so was thinking maybe pioneer or yamaha? I really don't know much about brands anymore. Any input would be greatly appreciated.

Forgot to mention, it's a small living room setup, maybe 15' x 10' with a ceiling height (sort of slightly vaulted) of around 12' high.

Thanks in advance.

Thanks for the reply. I'm not wild about the cherry finish. I prefer black to match everything. Do you have a link for the Pioneer speaker special? Couldn't find it. I really dig the speakers though. As far as head units go, I need something with 3d pass through. Are there any new features I should look for? I like the idea of having the on screen menu through the tv. I've heard good things about denon.

Edit, never mind, I seeded the promo discount now.
Edited by dougstoner - 10/7/12 at 3:44pm

After doing a lot of research on those pioneer speakers, I decided to buy them with that huge discount. All the reviews were pretty much the same, incredible value for what you get. Now, it's time to pick a receiver. I need 3d pass though, and would like some cool features like bluetooth, and must have at least 4 hdmi inputs. I think I'll up my budget to around 4-500 for this. Any suggestions?