i do it all bmx style. race, flatland, street, park, dirt. race bike: pro concept (a gary turner, mike devitt made frame) flat: usa made hutch trickstar. other: s&m dirtbike. cruiser that can do it all: badd
i actually built up a fixie originally to get a little bit faster on the bmx track. it works.
check out
www.vintagebmx.com for some info on anything old and bmx.