i haven't seen any portables running at 7200rpm (which certainly doesn't mean they don't exist!)
i wound up buying an 80g ezquest drive, for the speed, and a good price. the portables are pretty pricey for what they are (less gigs, 5400rpm)
not crazy about carring the ezq, but it DOES fit in my backpack, and i can transfer files to & from it.
just a thought...