to get really high bitrate videos you need a bluray drive - there you have got an average of about 30 mbps with 48 mbps peak with mostly vc1 and some h264 l4.1. maybe some really old ones with mpeg2 too, but did not get those yet.
Really? Because I can tell you as a matter of fact even including bumpgate effected cards the ATI's have a higher failure rate then the Nvidia cards. For every Nvidia card that was replaced ATI cards were replaced 10 x more. These include the 7500, 2600HD, X1900, X850, 9000 Pro.
As a side note, an ATI card was also responsible for killing a dog. Long story short, Apple sent out a replacement ATI card, the courier rang the bell, nobody was home, so he left it in the dog pen (at the owners request). Dog ate the packaging and card and choked on it.