Where do u live? I bought a Asus 9800gtx+ Dark Knight that actually cost less than the original asus 9800gtx itself. The die shrink of the G92 core is supposed to make the card cost less, NOT more!!
Taken from
http://techgage.com/article/asus_en9800gtx...b_dark_knight/1 :
"...Price-wise, the 9800 GTX+ is currently no more expensive than the original, so it's important to dig for the best deals. In some cases, the original costs more, so make sure a plus sign is in the title, and you'll wind up with a better product..."
So I'd advice you to wait abit for a price refresh of some sort in your area.