If you have a 8800 GTX, 8800 Ultra or 8800 GT, you might as well save your money, don't waste it on 9800 GTX or 9800 GX2. These cards are more or less what you already have. In some important areas, really less. Save it for the upcoming GT200 based 9900GTX or 9900GX2. Which will should be arriving Q3 2008.
http://www.techradar.com/news/comput...on-test-318825