Thanks, Thats a great reference. Exactly the kind of info I was looking to get. Looking at the charts, a 3400 is a pretty solid card for watching videos. Im still considering if upgrading to a 4550 would be worth the upgrade.
I'm still tampering with the settings in catalyst control center, It's gotten better. Planet earth on blu ray plays almost perfect with certain scenes lagging, Digital Video Essentials HD DVD still lags pretty bad though.
Thanks for the help.