USMC security forces or infantry (uh)?

Hey guy, i leave to boot camp November 16th, and im stuck between these 2 MOS's. I don't know if i want to be a security guard or regular infantry. i know you go infantry after 2 YEARS of being a security force but from what I've been reading on the net there usually shunned upon because of their lack of grunt experience and there considered a "glorified security guard." As with infantry, its the backbone of the Marine Corps. That MOS is enough said. Basically, i just want to get the most of the corps out of my 4 or 5 years I'm going to be there. I want to be able to go to different schools and learn different things but I don't know which route in the end will allow me to do that.