I'm looking to build up a track bike for racing (first time doing this) that I'll also probably ride around town for commuting. Is this an oxymoron? I don't want a total P.O.S. for racing but I also don't want some delicate high-performace machine that I'll be afraid to ride around or leave locked up. I ride brakeless fixed-gear on the street and I feel comfortable with it, so there's no need to go for a track frame with drillings in it for brakes. The two frames I'm looking at now in my price range (under $600) are the Bianchi Pista Concept and the De Bernardi Thron Track. I was looking at the Soma Rush and Surly whateverits called, but those look like heavy metal street machines never meant to skim around a velodrome. Given my circumstances, is there a recommendation anyone can give me between the Bianch and the De Bern? Any other frames besides the two I have in mind?