hi all, i'm a pretty hardcore geek but do not know much about gpu technology (not a gamer and never have been). I have a G4 sawtooth 500 that I use as a media center and it only has a Rage 128 pro 16mb. very soon I will be upgrading the cpu to a G4 1ghz and would also like to upgrade the agp slot to a better card. the main thing I am wondering is if a better card would really help me. all I do on this system is watch divx, dvd, quicktime and listen to music with itunes. would a newer vcard help me? will a modern tech vcard render video better or will the faster G4 cpu be all I need?