I guess I'd have to say LBT 2. He looks so cute, though LBT 5 was pretty good, too. His first design was the cutest. Really, it's hard to decide between LBT 2 and LBt 5, but I'm gonna go with 2.
EDIT: Also, I've never noticed before, but he DOES look more accurate in LBT 2. Huh. I never noticed that, but that IS a good point.