I would recommend you find a receiver that has pre outs so that in the future your able to add amplification and adequately power those RTI10's. A receiver @500 won't do them justice. Now if you start looking at Yamaha Aventage, Pioneer Elite SC, and Denon 33XX, then you at least know your getting some good juice out of them to power your speakers. As far as a sub goes, I recommend HSU, SVS, Epik, or Outlaw. SVS has some really good subs for 499.99. Good luck.
Speakers (L/R,C,Surrounds)B&W CM6 S2, Polk RTI CSI5, and Polk RTI6.
Sub-SVS SB 2000 & SVS PB10-NSD
Receiver-Yamaha Aventage RX-A2000
Amp-Adcom GFA 5500