OK USB 3.o is fast much faster the USB 2 and that means that soon you will be upgrading to. And that is why you if you are smart already get USB 3.0 ready gadgets.
Like this 2.5″ hard drive enclosure for a sata hard drive, witch of course is USB 3.0 and works fine on USB 2 to but just slower.
And the nice thing about this case it s that it has an artsy print on it to.
Go check out this Eagle Tech USB 3.0 Hard Drive Enclosure.