Don't worry about BB, just ride with what they have.
Was thinking of running with a complete sram setup as it'll bug me if the crankset is different. Petty i know :p
In that case, get the SRAM BB30 version of your crankset and you won't need to change bearing.
@Shroom started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
Shroom
edscoble
Don't worry about BB, just ride with what they have.