I'm not Justin, but I have two identical Shimano Dynamo hubs (3N-DH72) on different bikes, and neither generates a lot of drag, with or without the lights on. One seems to generate a noticeable vibration in the handlebar when riding at speed over 15mph AND with lights on (but not with lights off), while the other one does not cause vibration at all. Strange, eh? I've heard this is a common complaint with the Shimanos, even the higher end ones, and that sometimes just backing off on the cone adjustment can cure it. Shimanos are notorious for coming out of the factory with the cones adjusted too tightly. I haven't bothered to play with the cones on my bikes.

Personally, I think all dynamo hubs look pretty good. Even the low end Shimanos have a nice satin finish, while the high end ones and the SONs and the VO hub have a polished finish. To me, they're all nice.