A 150 is going to be really tight with you, and your instructor, sitting in it. My guess is you will take one lesson and then switch to the 172 he has.

If you want to fly something newer, wider (than a 172), cheaper (than most airplanes) and faster (than a 172) try finding a Flight Design CT. You can get your Sport Pilot, or Private Pilot, in an LSA that is properly equipped.