Also, one thing that sets apart BK's from most other frames in the price range/steel frame category: they have a 45mm BB drop, so your chance of striking a pedal in the street or during match sprints on a steep velodrome are essentially zero. Hell, you could run 175's on the bike if you were so inclined and still be in safe territory. I can't think of any other current steel frames (and not a whole lot of aluminum ones) off the top of my head that have that high of a BB. (I have seen a few vintage Italian track bikes with similarly high BB's, but no Japanese keirin stuff I can think of.)

But mihlbach is right; what's fun on the street and safe on the track isn't necessarily ideal for the road.