Just curious, if you're getting a system to play music, why get an AV receiver when you can get a better integrated amp from Marantz like the PM5005?
While I hate subs and won't use them, you could add a pair of NHT SuperZero speakers and their matching sub and stay well within your budget and have a very good system. You'd be needing a source like a CD player, TT (the Marantz PM series have phono inputs), or simply stream from your phone, tablet, computer with a simple mini-stereo to RCA cable.