I would like to try something new on my gaming rig, but it's gonna have to be worth dual booting. I need a very polished distro with easy dual booting, the latest software, and easy Nvidia driver installation. I previously used Ubuntu 12.04 but switched to Fedora 17 Due to better graphics performance in GNOME shell. I'm looking at NetRunner, Mandriva (Might give Mageia another shot), or just plain sticking with Fedora. I also need an upgradeable distro, for example from V1-V2 without a fresh install. If anyone has any suggestions they would be appreciated! Thank you!

I will use the Distro for any game that has a native Linux Client. Any Base is fine. But I do not have the INTERNET 24/7 (and when I do it's a USB modem) so Arch is out of the question...