No useful comments about other shifters, I will mention that the Alfine one is huge. I did want to tell you that the hub itself is really wide. You need to take this into account when choosing a rim. If the rim is setup for a typical (narrow) hub, the spoke nipples will be aiming inward more and if you try to use that type of rim with the Alfine IGH there will be a lot of stress on the spokes right where they exit the nipple. It will lead to a lot of broken spokes. The nipple holes in the rim need to be able to aim the spoke out more to accommodate the wider hub.