Mdilthey, what is missing from the equation is the power to weight ratio of the rider which Asana addressed by the comment about speed. If you're putting out fairly high efforts the light weight rig will be a benefit. If you aren't the light weight rig will be easier to lift over fences. Personally I'd go with the stripped down PT with light wheels. You won't get anywhere faster TOURING with a bike that weighs a few lbs more. If you have 5lbs of extra fat you will benefit burning it off over the cost and compromises of a very light rig.