denon 3312ci, but I think its closer to $700 havent checked in a while, the 809 may be around $600 that a good avr too... they also have some good marantz units in that price range sr5007 and sr6006....
I would be between the 3312 and the pioneer 1222k new on sale at newegg for $550-600 usually... The pioneers amp section interests me, a true 600w all channels driven, but no triggers, so keep that in mind if you are going to separates you will need to use something to trigger external amps, not usually a deal breaker.......