I just had a couple of questions about current graphics cards. I'm looking to upgrade my system, and looking at some of Nvidia's latest offerings. However, I'm concerned that they're only DX10. Is that a big deal? Is it possible to upgrade them to DX10.1 with a software patch (thats probably a really stupid question, but hey). Also, is there any difference between the brands? What's the difference between a 8800GTX from say, BFG, EVGA, XFX, etc. if any?