We just built up a new spec' Santa Cruz 5010. They're shipping with the new XT 11 speed group. Completely redone with a lot of influence from XTR. I think the 2 by (26/36) is a smart choice paired up with the 11-40 cassette. Let's face it 1 x isn't for everyone. Nor is it ideal for every riding condition. The brake levers even got some revisions. The XT cranks got full revision. They're available in 1x, 2x and 3x! The 11 speed cassette is available in 11-40 and 11-42. Running a standard freehub you 10 speed compatible wheels will still work. No need to get a new freehub.