Purchase a comfort geometry one size smaller than you would normally ride. This provides a short top tube and taller head tube relative to traditional tt length. If you need a riser stem from there...that is OK for a recreational rider. I am not a proponent of custom frames unless you are over 6'5" in height. Most tall people have a std torso length and derive their height in their legs including me. Also seek a compact handlebar. The FSA Winged Compact in Al is hard to beat if you don't want to stretch out or go too low in the drops.