Aceves, What kind of racing are you considering? Gearing is my point: With the 120 mm OLD, you can only get 6 cogs on the rear, and ... what gearing can you get on a 6-speed these days, i.e. you can't customize anywhere nearly as well as you could BITD? And can you be competitive on a friction shift, even if you're a friction-feathering expert?
Or are you just out for some leg-pounding fun?