My astb scores were identical to yours, 6/6/6, I only had one letter of rec. from a teacher, but I will graduate with a math degree so I think that helped. Anyway, I was pro rec'd very recently, didn't take long at all. So I think you're in good position with the better letters of rec and interview. I have a 3.49 gpa in math, and lettered in a couple of sports in highschool, don't know if that helped. But I did get pro rec'd, so as far as I'm concerned your good to go. What FY you applying for? I got fy '05.
Also, I didn't know that enlisted had to go to OCS, I know nrotc doesn't, so I really don't understand why enlisted would, I'm sure you receive just as much training as nrotc, anyone have any insight on that?