SLI 9800GTX outperform a single GTX 280. even SLI 9800GT outperfom a GTX 280 so being they are GTX+ toase are better than GT so id go with the sli IF** you already have a SLI mobo. if not then the total cast for a mobo and another GTX+ will cost about the same as a GTX 280. if you have to go GTX 280 you should wait and see about the GTX 285
You are about to answer a thread that has been inactive for more than 6 months. If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.