Hey. I'm in the process of converting my first bike to fixed gear and am debating between two hubs: the bike nashbar flip flop hub ( http://www.nashbar.com/profile.cfm?c...eid=&pagename= ) and the I.R.O. Flip Flop hub off Harris Cyclery ( http://sheldonbrown.com/harris/fixed-hubs.html ). The debate lies in the fact that the nashbar hub comes with a lockring and the IRO hub does not, which would set me back another 8 bucks. (making $13 difference total). Now the question is, is this difference enough to warrant buying the Nashbar hub, which i can only assume is a little worse quality wise? Can anyone vouch for this hub?