What is the benefit of joining the Reserves before College?

I am in DEP for the Marine Corps Reserve and i plan on being in the reserves while going through college and doing PLC. When i commission i plan on trying to become a pilot however I am now thinking about switching to Active and going to college after four years and using my GI Bill. Which route seems better? And if I do PLC can i still receive a GI bill eventually to pay for my Masters Schooling?