Which branch should I join?

I think the Air Force is the hardest branch to get into as well. So if you've got the grades or test scores you should take advantage. The Air Force is probably the most technology focused branch so you're more likely to work on high tech equipment which could give you more marketable skills coming out.

Another consideration might be risk of life and limb. They tend to park the multi-million dollar jets out of harms way so you're less likely to be forward deployed in a combat zone.