I realize I'm in the minority here and don't want to debate the issue since the pros and cons of setback vs. straight seatposts and STA is a lively discussion topic among even the best framebuilders. Read this Velocipede Salon thread for lots of opinions from some of the best designers and builders in the business:

http://www.velocipedesalon.com/forum...s-18675-2.html

I really think it's a style thing. This is translated from German, so it reads a little awkwardly.

http://www.bikefitting.com/English/T...SeatAngle.aspx

Regardless, whatever works for you is right.