Agreed about the Windows thing, but don't agree about comments on wrappers.
Of course, the performance of wrappers isn't as good as you will get in Bootcamp, but for me BC is a non-starter, so wrappers or Parallels is the only way I will play non-OS X games, so I accept the compromise.
I have had good experience of Skyrim and Tomb Raider (long before it was released for OS X) wrappers. Have had good experience of games in Parallels too, e.g. Dishonoured, F1 2012, etc. All of these I have run and completed @2560x1440.
Of course, if there is a OS X version it's a no-brainer, but sometimes, we have no choice but to compromise.
Roger that, understand all. If you don't mind my asking though, as it looks like you are running on a 27" iMac, what is your GPU?