$100 less, not less then $100. Also, chances are you're thinking of the non GT 6800. Personally, I think buying the latest and greatest video card is ALWAYS A COMPLETE WASTE OF MONEY.
If you got a 9800 Pro for $190, (or a non GT 6800) you'd be able to play through Doom on High Quality and still get a great framerate. Then you could have $200 to put towards the next best thing thats cheaper down the line.
I've been shafted way too many times on Pricewatch. It absolutely isn't worth it anymore since Newegg generally has everything for a few bucks more at the max.