The GTX 260 is better bang for the buck. $70 more (that's 35% more) and you get 50% more stream processors. It also comes with a free game.
Edit: mind you, the 9800GTX+ at $200 is a very bad price. For example this HD 4850 is only $140 and beats it.http://www.newegg.com/Product/Product.aspx?Item=N82E16814102770