I have a Trek 7200, fitted out with frogs and narrow tires, set to ride dropped down, etc. I know the components aren't as great as a decent road bike, but what real differences in performance would I really see if I got a ~1000-1400 dollar road bike? I just started working a research job and the pay is enough that I could, if I saved like a madman, get a nice bike, but I just wonder how big a difference it will really make and whether I could really justify it. And as a related side note, where can I read up on current road bike technology as opposed to marketing schemes, like differences in gear sets/shifters etc. ?