Xgecko's Dawes is super nice!
All 3 come with fixed/free flip-flop hub, though. The Dawes is set up with a freewheel cog, and the Kilo and Hour with a fixed.
I'd get the Kilo, in 520 steel, or the triple-butted 4130 Windsor, and install a drive-side front brake, take away the rear, and pick up pedal straps. The Windsor will definitely stay under your $400 cap, even after the new brake and cog.
There's a Kilo love-thread in this sub-forum, and here's a recent one for the Hour:
http://www.bikeforums.net/showthread...y-Windsor-Hour!
Ride often, and you'll go fixed in no time! Also, steel will withstand the curb jumps when you need to.