Now that GOG.com has expanded their service to cover more recent (and even brand-new) titles, I've started facing a bit of a dilemma with where to purchase several games. We all know that GOG is an awesome site, and I fully support the trust they show in their customers by offering DRM-free games with unlimited downloads. They offer all sorts of fun bonus material with most of their releases, and the price is usually right too. On the other hand, while Steam does implement DRM, it's probably the most unobtrusive I've ever seen, and the overall integrated client makes it extremely easy to keep your whole game library organized in one place. I'm also only slightly ashamed to admit that I'm a total achievement whore, so I see Steam offering them with certain titles as a definite bonus, and one that unfortunately can't be resolved just by creating a shortcut in Steam to the GOG purchase. The crazy part of my brain has even thought about double-dipping on a few titles, until I remember that I don't even have enough spare cash to single-dip on everything that I want.
So have any of you guys run into having to make this choice? And if so, what did you go with?
(As a side note, the main game that brought this thread to mind was Alan Wake, which everyone and their mother needs to play. I got a free copy of it with my brother's 360, and I'm planning on buying it for PC too...as soon as I figure out where to buy it...)