I think as long as you are honest with them at Batt, and tell them that you are only planning on being there a couple of years so they can be a "stepping stone" to getting a "real tab, and not just half of one" (use those exact words), you should be fine. If anything, they will at least make sure you will come to SFAS in shape.
Honestly dude, because no one else will probably answer your question, here goes....... If you want one of those paths bad enough (like, very..) and prepare accordingly, you will most likely do fine. If you want Regt. as a stepping stone, or 18 Series because you want the extra pay, you won't. Now, I would advise following the board SOPs and lurking a long, long time....anything you could possibly want to know is already on here as a thread and is available with a search. Also, the BTDTs on here are mean....