Two things:
#1 You aren't going to be able to find a deal out there that guarantees that you are going to fly before signing up. quote]
This is actually inaccurate in regards to the Air Force. You just have to talk to an officer accessions recruiter and when you apply you just put down pilot. If you are selected the only part that is not a guarantee is if you are medically disqualified from Brooks or wash out of pilot training for that matter.
I was and have many friends who applied off the street for an Active Duty Pilot slot with the Air Force and got selected and when the time came to sign on the dotted line it was only for a pilot slot.
If you were to get selected for a pilot slot and were eliminated by one of the stupid tests at Brooks you would have a good chance of leaving the AF without any commitment.
As L'il J.Seinfeld said, I would look for a guard unit. I was selected for Active duty but ended up turning it down when my guard unit awarded me a slot. I personally believe the guard is the best way to go, and am very glad I did not go the active route.