Check this site out and e-mail/call for price. They have the Onkyo SR601 on sale for less than $500 and they are an authorized onkyo dealer.www.bestpriceaudiovideo.com
As far as power ratings go every company, with the exception of HK, over rates power and this includes denon. Im not saying that one company is better than the other and mass market receivers in the same price range usually yeild simaller performance. You have to go and listen for your self. Since you have already been bitten by the upgrade bug, I would buy a receiver with preouts if I were ytou. Good luck.