Here is a softball - anyone want to take a swing?

I have an Onkyo 501 - a decent reciever but not a great one, I gather.

What does one get for $700 or $800 (lets say a Harmon Kardon or other best for the buck). Enough difference to get behind in the rent? Or, more precisely, not have the money to buy the new Treo 650 when it comes out?

M22s, QS4s, M2 center, Hsu stf-1.