FWIW, I'm 6'1" and ride a 59 cm Extralight. I think I could make a 57 fit if I had to. If you're happy with the fit on your Trek, I'd work off those measurements, and see with which frame you can most easily duplicate that fit.

As for compact vs. traditional, I think it really is personal preference. My bias is that comapact was created to make things easier for manufacturers, not necessarily better performers for consumers, and I just like the look of a traditional frame.
By the way, have you thought about springing for the Extralight? this is a long term purchase, amortized over 10 years, the extra coin is no that much.