I was told the codec of the G450 provides a sharper text than the G400. I'd rather, if forced to the choice, have sharper text than just about any other feature or characteristic. I was going to pursue the issue of performance only to the extent of if the TBird would be wasted money on a system devoted to web usage and programming.
However, with the difference in price D800 approx. $80 and the TBird 800 about $100+, it hardly matters.
Thunderbird rules!
Thanks, and thank you AMD!