I would let the lbs build it. Get it sooner if nothing else.

I like the look of the LHT complete. I think the only thing I would change is to put big apple tires on (I would have one w/ 26" wheels). But that's just me. And if possible get a red one rather than blue.

All I really think I could evaluate is drivetrain (gears), frame/fork (eyelets mostly in my philistine eyes, some angles and lengths), maybe wheels/tires. I don't know from headset, bottom bracket, cable hangers... and assume lbs would be as (much more) informed (than me) as Surly would be so I wouldn't have a problem deferring to them if they weren't going to duplicate the part.