stingerhs where were you a month ago. The x1600 Pro 512Mb card is the one I purchased. I didn't even see the x1650 at that time. Oh well. More room to upgrade later I guess. (Is that a silver lining or what?) But gandiva, FWIW, the x1600 Pro 512Mb is running Oblivion very smoothly with HDR and x2 AA turned on. So you'll be better than that.
Edit: ooh there's a silent version of the x1600 Pro click
which would've also been nice, since it's the loudest thing in my Antec case. Oh well.