both those are lovely bikes, are the aero levers good to use in traffic ect?
And 2 brakes vs 1.....
The aero levers are great but you obviously need to make sure the stem length is right or you'd be straining to reach them.
Yes 2 brakes, I don't want this to disolve into a 2 v 1 brake debate, but for what's it 's worth I always run two, the first Peugeot I built was more for show really as I knew the frame was too small for me, but I knew I'd get decent money for it renovated and that I could re-use the components on another bike, and that's why I just put a front brake on that one, but the Langster is used in real time rush hour traffic, and as such I just feel safer with 2 brakes. I don't often use the rear, but I know it's there and it has proved it's worth on more than one occasion. For the record, this model of Langster was always supplied with 2 brakes, go figure!
Another good site to look at is
Freshtripebikes, they sell full on bike porn like this..........................
and this