I'm really close to pulling the trigger on a black Onkyo. I've read all the reviews, compared the prices and it seems the 603 is the best bet for a great starter/mid priced receiver. I've found it for $350us on ebay. If anyone knows where I can get it cheaper or want to throw in some other alternatives, please do so.
The speakers are Polk RTi8s mains, Polk CSi3 center, RT15 rears and a Polk 10; Sub so far.
I'm pretty sure the receiver can handle these speakers with ease.