I am being given a computer (Dell Studio 1737) as a gift and, apparently, it can run x64 OS in addition to the standard x86. For those of you out there with some expertise, is there a real-world advantage to running x64? I understand that x64 is somewhat faster, but it requires programs written for the x64 architecture and, otherwise, will run x86 optimized software *more slowly* than an x86 OS. For those of you running x64 Windows 7, do you have trouble finding x64 software? I've noticed that many programs do have x64 versions, but I haven't cared enough till now to see whether enough of them do. What do you think? All help appreciated!