might i suggest a EP2500 for the Q. its what i am running my 15" Q off and i really like it, allot. especially for the price, check ebay. I really really like NHT speakers, maybe a bit out of you're price range but their classic zeros and the threes are amazing. just give them a good amount of power. And they are beautiful, the piano black is so sexy. for $500 for 5.1 i would get a $250 reciever (marantz, denon) and then spend the rest on some JBL or something speakers you can get cheap. or wait for more cash and get what you really want. One thing i must say is to listen to the speakers before you buy (except cheaper stuff, JBL all klipsch basically sounds the same just higher levels get louder and clearer). If you can listen to them in you're house before buying as the location of the speaker can make a huge impact on how it sounds.