How are the Dura Ace hubs?
 

I recently picked up an old Lotus Classigue at work and have so far converted it into a single speed using the orginal Shimano 600 parts. I want to get a fixed gear wheelset for it though and am wondering about the Dura Ace low flange track hubs (havn't found any of the high flange ones yet) The only other hubs I'm really looking at are the Surly's. Thoughts or comments about either of those choices appreciated. Thanks.

I have one bike with a Dura Ace low flange track hub and it's nice and smooth.
I bought another one on ebay to build up yet another wheel.

I am in the process of building a wheel and I am looking at surly and dura ace hubs as well. It appears that dura ace hubs have loose bearings, while surlys have sealed cartridge ones. This may not be a big deal since DA's are easy to dissassemble and service. I also heard that DA's are really smooth. If you ride in rain, snow etc. then surly may be better choice since they are sealed. For track use get a DA.

On a different note, does anybody know anything about this locking device that secures a hub through the locknut:

http://pitlock.de/eng/onlineshop/ind..._(rohloff).htm

The lock nuts seems to fit a surly or DA rear hub perfectly (10mm dia with 1mm pitch axle threading).