I wnat to add a second monitor to my computer for use with FCP 2. I have a dual 450 g4 512 mb RAM and a 40 GB HD. Any recomendations on a video card. I have looked at the radeon cards, are they sufficient and how difficult are they to install? Also I want to add a second HD preferably 60-80GB to be used only as a scratch disk for video clips. Any suggestions for a good internal drive for this purpose?