Decided to pull the trigger and pick-up a closeout 2012, tough to pass up for $2k. Now trying to decide between L and XL. The only shop near me has only s, m. I'm just shy of 6'4", gorilla arms 35/36" sleeve, 34" inseam. Ive sold my other rigs and have just been riding a built up Trek Marlin SS which is 20" (they offered up to 22"). It feels pretty good, maybe a little smallish. Any opinions from other HT riders? I know this bike has one of/if not the longest wheelbases, chestain in its class.
Thanks
James

Definitely XL.
Stem is probably 100mm, so if it lays you out too much, try something shorter and/or roll bars to accommodate fit.

You absolutely need an XL. I've done a quick spin on a Horsethief and it has average geometry. At 6'4" no doubt you need at least XL in *any* bike.

If your local shop doesnt have any XL left, try online. Universal Cycles, maybe. I see the Horsethief on clearance every time I visit their site...