I'd go with the 62. The longer TT will be less of a issue since the use of a bar like the oxford moves the hand back 6" or more compared to riding the hoods on a dropbar.As for asthetics,I think a short seat post fits the "vintage" look of a townie.The old rule for seatpost height used to be a handfull of post(~4-5") is the way to go.