Every distro I listed is awesome in it's own ways. Arch is great, but you will break it.

Arch is for people that want to learn Linux enough to fix it and/or tailor it down to the last package, if you want something that just works no matter what, it's not for you.

However, if you have a second PC and your activities are not critically important and you have lots of free time, it's great to learn how Linux works.

Having 2 drives also works fine. Just don't dual boot on the same drive, as that will eventually result in being unable to boot.