Let's face it, not everyone needs (or wants) to carry their computer around on the daily routine. Sacrificing portability can have its advantages -- and while nettops and all-in-one PCs have become a much more dominant force this year, the traditional, highly upgradeable desktop tower is still the reigning bang-for-the-buck champ. Just make sure your certain special someone has enough desk real estate for whatever potentially-enormous chassis you decide to take home and wrap.