Enlist as 18x or 19D before going SF?

[mcarman]

Hi everybody, I have been searching around and haven't been able to find exactly what I am looking for. I have some questions on whether to enlist with an 18x contract and go SF right away or enlist with a 19D and spend some time getting extra PT, training, and experience under my belt. I am just wondering what the pros and cons to each decision would be. Either way my ultimate goal is to be SF one day and I am training extremely hard to achieve that.