Toss up between the bars. Though, it looks like the Trans-X may be a little longer in the horns. So if you have long arms, it may be a little more comfortable. Running off stock photos, no first-hand experience. Other than that, black or silver. The trans-x might be slimmer in diameter now that I think about it. Think it's an TT-base bar.
Bottom bracket-wise. Just get a 107mm bracket like the cranks require. A 110mm Shimano BB is doable, but you'll probably spend another $10 replacing that plastic cup.