I'd like to build a decent video editor with USB 3 connectivity without paying retail. I'm told I need to be careful that the USB 3 card is compatible with the operating system's driver (hope I got that right). Currently editing on 2.66 GHz Intel Core 2 Duo MacBook Pro with 8GB of 1067 MHz DDR3 ram; want to create something faster in a tower (probably '09 and later), and add USB 3 connectivity without paying retail (oh, that apple name). On a related issue, presently am clinging desperately to 10.6.8 Snow Leopard because it's more stable and if I upgrade i have to bid farewell to my Final Cut 6/Studio 2, because I'm told it will not run on Lion or Mountain Lion. Sigh. Knowing which video card is best would help as well, though I may settle for whatever it comes with if I can get the rest right. Your thoughts, those of you with greater tech wisdom than myself (which might be just about anybody on this forum), greatly appreciated.