Would the following setup run hi-definition mkv files without any fps drop or lip sync problems? AMD Athlon 64, 2000 MHz (10 x 200) 3200+ (Orleans) NVIDIA GEFORCE 8500GT 512MB 128BIT DDR2 (DirectX 10) PCI-E 16x 1GB RAM DDR2 I have Windows XP Pro already. Should I buy Vista? If so, which version? I want to watch huge mkv movies that contain h.264 encoded material. MediaInfo reports that the video bitrate of such a file is 14Mbits/s. I can't watch it right now with my current setup, as my video card cannot decode h.264 on its hardware. The fps drop is dramatic. It's not watchable. It will be whole new investment (new mobo, new video card) so I wanna be sure before buying anything. Thanks in advance.