I'd seriously recommend at least giving Arch a spin, since while it's definitely jumping into the deep end, installing it gives you a decent understanding about the basic building blocks which Linux distributions consist of.
This makes troubleshooting easier, combined with the excellent docs Arch has. But it's definitely a weekend project and probably something you should do for your older rig first to get a feel for it.
Another benefit is getting new software early, which is expecially important for gaming since driver performance is improving steadily.