Linux distro?

I'm sure somebody out there has an opinion... a couple of you said I should install Linux on my new machine. So, I'm going to do so. (Dual boot, though, with Windows -- I may even reserve some room and throw QNX on there as well. Or, maybe not.)

So, which Linux distro should I install? I'm looking for ease of install and ease of use. I can wield vi, though, if I need to.