As to the build quality of the device, smoke over this thread:
AndroidForums.com | HTC One - Build Quality
In a nutshell, the black has been shown to scratch easily and show fingerprints more so than the white/silver
I'm going to have to respectfully disagree on this front. I don't believe that the Black Color scratches easily at all. In my experience the surface is quite durable and hardened to almost a soft ceramic feel, much like the main area of HTC's Evo 4G LTE chassis (In the Build Quality thread above I go into more technical detail).
It
doesn't scratch easily in my experience. I've been using the Evo 4G LTE for near a year and half, case free, and the main chassis area is soft and still flawless. I carefully sanded off the Sprint logo in the first month and it was
quite difficult to accomplish.
However the plastic end pieces have fared a little worse and have some surface marks. The One has lower quality aluminum "end pieces" that cover the speakers - they have the grille holes through them -
those have been shown to scratch very easily because they did not go through the same manufacturing process as the main chassis.
A vicious drop of The One, that is hard enough to mar/chunk the aluminum below the Black color, will show through in aluminum color. The surface will take a beating to a degree, but it is best not to drop the device say onto rock, concrete, or onto one of the leading edges.
I love seeing the follow up to queries like these. ITemplate, I'm interested in what your final decision will be, no matter what you choose. Don't be a stranger, let us know what you end up deciding.
Over in the Accessories thread I just added a link you might find interesting, leads to a Black skin that could give the Silver One a cheap but rather convincing Black appearance.