College Student: Sport Bike or Lifted Jeep?

ey guys, im leaving for college in the fall, ad trying to decide what to get. I either want a huge lifted wrangler tj---6 inch lift, 35s (more practical because of carrying passengers, weather, comfort, and versatility) or a sport bike (yamaha r6 or suzuki gsxr750) ive ridden dirt bikes my whole life and test driven a few and i really like them. They get FAR superior gas mileage and menuverability, and insurance is dirt cheap. Im gonna have to pay for my own gas so thats a major concern. What do you think i should get? Any help is nice. THANKS!