currently I have a stereo setup in my room but I am going to be switching to an h/t system. I currently have a denon receiver which I do enjoy but as i said its only stereo

I was just looking for som suggestion to narrow down my search

requirments
must be 4 ohm stable for the rears
must beable to power bw 602's about 80 watts
I will still be listening to more music so the receiver must beable to produce quality stereo music
besides this everything else is up in the air 5.1 will be fine and I will most likely buy used for under 500 if possible
integrated amplifiers are fine too
must have a subwoofer out

if it helps its in a small/medium room with an hsu subwoofer and klipsch rears

thanks for any direction you can provide