Well, I won't pretend I can tell you what is best, but, I picked up a retail Radeon 7500 at BB today for $74.99 - $20 mail in rebate. It seemed like a damn good deal to me.
I picked it up for upgrading the kids 440bx box from a VooDoo3.
I must say that for 54.99 I am verrrrry happy with the bang for the buck.
.02 cents