Huh, I didn't see this thread last week, but I thought this would probably be a big enough deal to get a GAF thread. Good.
I bought DMC4. HD Collection's still not a great port and I'd personally rather stick with the originals. But DMC4 is great on PC. Capcom's MT Framework games like this and RE5 had such an incredibly clean, pleasing look to them that has allowed them to age better than just about anything else from that era. I still think they look good.
There is an issue with the PC version of DMC4 SE to be aware of, which is that some people running the game on newer operating systems at certain resolutions above 1080p are encountering a crash at launch. This was the case in the Steam version, too. GOG is working on a fix at the moment, so there is that to consider.