Altair
Explorer
The performance issues are for people without a less capable gaming machine. Let's face it, this game is very demanding. If you lower the settings, you'll be sacrificing a lot of detail. You're covered, as far as performance issues are concerned. You card should easily pull this off on Ultra settings, minus Uber-sampling of course. The rest of the patches are filled with fixes for various issues and others with bonus content. The Enhanced Edition is the patch you should be aiming for. I haven't faced much issue with it, nothing game breaking, so to speak. In ALPHA's case, I'm sure it's something to do with his patching process. I have installed and patched the game nearly 10 times now and didn't encounter any major issues. So yeah, if you're concerned about performance issues, don't be. Just tweak everything through the game's launcher.
Mine is descent enough? I hope so?