Speed or Space: Faster kill response or 1TB storage space... what to do?

The decision which one to buy was so annoying that the opportunity to acquire either one of this items was so much of a magnificent deal that passing up either one would surely be an annoyance that will be like an itch I cannot scratch. To the input of the co-spies from my previous advice post your opinions and suggestions are much appreciated. So... I got them both! Seagate FreeAgent Pro 750gb and Razer Lachesis Gaming mouse

Now what am I to do with 1.070TB space? Wait why 1TB when its 750gb HD only? Well last November I scored a 320gb SATAII(300) 16mb buffer on sale for $59 that I'm currently using as my storage drive while using a 6 yr old WD60gb IDE drive, so no I make the 320gb my main OS drive and 750gb storage then sell the 60gb for 1k.
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