I will say there is much to be said for the versatilty of a quill stem. My last GF had a threadless stem, and I had to adjust it because the shop set her bars too low. This was a lot more work than it would have been with a quill stem. I'm not sold on the threadless set-up; there are weight savings, but if you want to shave weight, it's best done on the outer edge of the wheels (tires, rims).