I got a few questions:

the hour comes with free Rear Brake and Lever.
is it safe to have only rear break?

Also, I noticed that the Hour comes with fixed cog and the Clockwork and SST with freewheel.
is this accurate? how much and where can I get any of those?
(links to direct sites would be awesome)

Also, can anyone compare the SST to the Windsor? I prefer bullhorn so I tend to lean toward SST, but not sure what else is different.
and last question: should I get 54cm or 56? (5' 10", 31 inch inseam)

thanks!