I believe Codeine just purchased this card so you could probably have a pretty good discussion with him.
In my opinion, and if I were in your shoes, I would hold off for just a bit longer. The 9800 Pro may not be the best of the best anymore, but it's still a pretty decent card that can handle most of the new game engines all right.
In May, ATi will be releasing a new generation of cards, and I assume nVidia will follow suit. This means if you wait the two months or so, you'll see a signifigant price drop in the x800 XT.
That's just my advice though, you may do as you please.