Glock. It may not be shiney, it may not have wood detailing, or intricate engraving, but there is a raw beauty in its simplicity. The hard edges meeting the soft contours... its a work of art.
And unlike most works of art, its within just about everyone's budget.
(Though, I do agree with the duling pistols. Those are always damn fine)
I have always loved the look of a blue HK P7M8 with Nill Grips..... It is just so sexy in a "this is what James Bond should have carried" sort of way....
I have 2 of the 5 they claim as the most beautiful pistols. I have to add in on the 1911 vote. I'd also have to say I prefer the Walther PPK over the pocket pistol they chose.
Glock.
Simple and reliable, that's beauty for a gun in my opinion.
If you want to talk about the look only im sure you can find beautiful guns engraved by hand but that's not something you get from the factory.