Hi, My sister has got a powermac g4 867, and she's looking at upgrading the video card. It's an Nvida 32mb card. She's using final cut express and it's running a bit slowDoes she need to get a specific type of video card? Would she be able to use a sapphire radeon 9550 256mb? It's about £50 which is about £70 cheaper than a slower card the guy in the mac shop showed her. Also does anyone have any recommendations on external dvd writers? Thanks.