I am currently thinking of buying a mac pro. But I have some questions. 1) Which of the below graphic cards are the best options for playing the better and more demanding games on the market at the moment? (I don't wanna buy a super expensive graphic card and only use 70% of it) NVIDIA GeForce 7300 GT 256MB (single-link DVI/dual-link DVI) 2 x NVIDIA GeForce 7300 GT 256MB ATI Radeon X1900 XT 512MB (2 x dual-link DVI) 3 x NVIDIA GeForce 7300 GT 256MB 4 x NVIDIA GeForce 7300 GT 256MB NVIDIA Quadro FX 4500 512MB, Stereo 3D (2 x dual-link DVI) 2) What is a Fibre Channel Card? And what is it used for? 3) How easy is upgrading the RAM and adding a second hard drive on your own? Is it as easy as just sliding it into the back of the Mac Pro or something like that? 4) Stupid question, but the Mighty Mouse can right click as well, right? 5) If you run Windows XP using Boot Camp, it's going to be almost (if not exactly) the same as running Windows XP by itself, right? 6) I heard that the Mighty Mouse is very hard to use for beginners. Is that true? If so, is it recommended that I buy another mouse? Will normal Logitech mouses work for a Mac Pro? Thanks!