indi -

So... I'm about 5'11'' w/ a true 32.75 inseam. I went for the 56cm frame on the surly steamroller. I haven't received my order yet but I can say i test drove the 53cm and the 59cm and I was somewhere in the middle. Look at your Standover height (on their website) to get a feel for what is best for you then go check out a few similar bikes at your LBS. This helped me get a feel for what the 56cm would be like even though i didn't ride it.

I was on the M sized Schwinn Madison before so that was my main fixed/ss comparison.

I'll let you know if this worked out for me once i get it in later this week.

Cheers,

kj