The BK is a great track frame, but honestly, its too damn stiff for the street....it bucks and bounces and doesn't handle bumps and waves in the road as well as a proper road frame. If you only plan on riding smooth roads or the track then go for it. However, the BK is overpriced nowadays. They were hundreds cheaper when I bought mine a few years a ago.

The leader frame looks nice, but it has weird geometry compared to the BK, and I'm not talking about the headtube angle. The frame is very long and low..the reach of a 57cm frame is more like that of a normally proportioned 60+cm frame. Compared to a BK, you'll need a lot more headset spacers and a shorter stem to fit that thing.

I'd consider a Soma Rush.