I am biased as well, but think JJ has put you on the right track. As far as the services go I personally think the AF treats you better as far as housing/chow halls etc (JJ, please correct me If I am wrong,)I've been out going on 18 years now and things could have changed A LOT. As far as armorers are concerned, I THINK the Air Force only has SAMTU (Small Arms Training Unit) that are the true armorers, but that as I said may have changed.

By all means, do like JJ said and check out each branch, telling them what you want to do and see what they have available. And YES, each branch will "Hype" their own as the best. DECIDE FOR YOURSELF which one offers you the best opportunity to do what you want, and the old saying "IF IT SOUNDS TO GOOD TO BE TRUE, IT PROBABLY IS" also applies to the Military.

Good luck.