My next big waste of money on bikes will be an X01/XX1 set-up for my XC duallie. I'm going to stay on a metal 26'er for a long time, but I'm totally sold on 1x11. Changing the freehub body is annoying, but cheaper than replacing cranks so I can go 2x10 (yeah I'm still on 3x9) and running 1x10...