if you like keirin, go with it. as 128 said you'll be fine.

if you feel that a keirin frame is superior to a converted road frame based on aesthetics, that's fine too.

but if you feel that performance-wise a relaxed geometry road frame (plenty of lugged ones around) would be better, you have to decide where your priorities lie.

for what its worth, if you did get a road frame, you'd probably save enough money to have the braze-ons removed, track ends installed and have it painted any way you want.

edit: i see you're in woodbridge. check out http://www.dcfixed.com if you ever feel like coming to ride in the city. over there they call me john