Seat Boy and mfredrickson, thanks for the product plug, I really appreciate the support.
I myself being tall, 6'3", have helped a few people out, but on the tall end of fitting, extremes can be exaggerated. Example being my brother-in-law, we are the same height, but his inseam and saddle height are about 4cm taller than mine, he is all leg. Funny thing is the old sport touring frames like a 64 with a 58cm top tube fit him as well as a custom would. I on the other hand prefer a little more top tube. the Surlys IMO are a little on the long side, and soma's offerings do not go as big as you would want.
IXTX. A couple of questions I can ask that may help you find a fit. What is your current saddle height, center of crank to top if saddle? and while you are at it can you measure the top tube on your current ride, center to center?
Post the dimensions of you current ride and it will help the group get you some solid advice.