Weird setup with 83mm BB but standard width dropouts (if that's what it uses). I would think if you are going to use an 83mm BB shell, go ahead and use a 150mm spaced rear end for better chainline and clearance. Using just one of the other seems not right.
It turns out that the bb shell is 83mm for pressfit bb. I'd rather see 83mm threaded with a 150mm rear end, like drj0n's(drj0nswanderings | Just another WordPress.com site). Race Face has plenty of cranks that work with 83mm threaded. There are actually more manufacturers out there than most people realize.
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