I wouldn't say there's enough info to base that on (although the Kyro 2 is a good card, from everything I hear). What are you going to use your computer for the most?
The GTS is good, but you might try a Pro or even an Ultra if you have the money.
I don't know much about ATI cards, but I'm sure someone else will be along shortly to let you know.
And please don't yell, I have a headache as it is.
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Whoever thinks up a good sig for me gets a prize