Originally Posted by
duanedr
Some (many actually) people enjoy the agonizing part, so I don't want to take that away from you. However, this really should be something your builder decides based on all of your parameters - size, weight, riding style, intended use, budget etc. Mixing and matching the tubes across ranges will result in the best bang for your buck.
I agree frame builder should select the actual tubes, but they do give you the choice of tube families I listed and at different price points.