From an economic perspective, would it cost you less to 1) Stay in school (pay tuition) and continue doing part time work during the school year, and do a summer internship this summer, or 2) Leave school and work full time, but pay for living expenses?

I am a CS Junior as well, but I wasn't in the Marine Infantry. I agree with pradn about the social signal of having a degree, but how do the costs play out? And do you already have any full time offers?