I'm pretty much at the point where I've had enough of Windows. Currently looking at moving to Linux (ubuntu, Mint, Korora, or Netrunner) but I have a feeling I'll still need to keep a windows partition for gaming. How viable is it as a primary gaming platform for newer games and how well do older games work with WINE?
If your profile info on your GPU is correct (HD6900 series) you've actually got a chipset that
works well with both the opensource drivers and AMD's propriatary catalyst. Normally I'd say that a good gaming system goes to waste if it's Linux only but as far as hardware support goes you should be more than alright.
Regarding Wine, in case you aren't aware of it, there's a
database with reports on how various games worked and what one needs to do to improve that. You should check the games that interest you to have an idea of what you'll get. Keep in mind though that wine configuration has a certain learning curve, which at least I never bothered to overcome (tbh I also have the dual chipset factor to complicate things). The PlayOnLinux wrapper is a the most popular wine frontend to ease use. As far as old games are concerned Infinite Engine games worked with no fiddling whatsoever out of the box and were bug free for me.
As far as distributions go I must admit I had only passing knowledge of Korora and had not heard of Netrunner. Frankly about 4/5 distributions are mainly people applying tiny changes to the leading projects and changing the branding. I'd recommend sticking to one of the big distros as are both close to the upstreams and have the infrastructure to support to properly support their "products". Also the ease of googling an Ubuntu issue vs a 00000.1% distro cannot be overstated.
While I have no love for Canonical (or even the current product itself) I think the ecosystem that Ubuntu (and derivatives) has built and the fact that it's the first supported platform for commercial software among the distributions makes it IMO the best candidate for a newly-migrating user. The app choice you have is only rivaled by Arch and that targets a very specific niche.
Depending on how adaptable you are the Desktop Environment might be a factor in your distro choice. Generally Fedora is the GNOME distro, OpenSUSE is the KDE one and Ubuntu is a
mess gateway to everything else. Keep in mind that the two main DEs do most of the technical heavy lifting and unless we're talking about a niche DE (like the ultra lightweight ones) or a rare outstanding job (Elementary Luna) since you'll be using their technologies they are also your best bet for code quality (my pet peeve with Mint).
If you go for a Ubuntu or derivatives I suggest waiting a bit until the new Long Term Support versions are out (17th of April for Ubuntu) and then
sticking with them. The non-LTS versions have too much breakage to be worth it.
From what I can see there's little that Korora does that can't be achieved with a simple post-install script like
Fedy. While a Fedora user I have to point that it is generally not stable enough to suggest to a migrating user.