What an awesome goal! I would advise that you schedule time to speak with your student advisor or counselor to ensure that you are indeed on the right path to gain entry into Med School. Your choice of undergrad college should reflect your future plans; however, I don't think there is a tremendous impact. Good luck!
In general if you are interested in research, you may want to look at the more elite private institutions, but if you are interested in clinical practice, a state university may offer the best value