OFFICER OR ENLISTED!! help?

let me get this out there. i WILL be going to college. im just debating if i go officer or not in the Army. I do not at all cost want to be doing a desk job! i hate doing any form of paperwork. I really want to be in the 75th Ranger Regiment or 101st/82nd airborne. i would most likely stay in for 10-15 years. I want to be infantry, can the recruiters guarantee in my contract that i will be infantry or is it just combat arms, and then its up to the Army to decide where i go. all i want to do is infantry and leading men into combat. I would love to be an NCO, but with a college degree, i might as well take advantage of it. What do you think would be a wise decision for me? How can i be guaranteed to be infantry in my contract? What is the best way to get into an airborne unit or ranger regiment?