My vote goes to Western as well. I was accepted at both, but decided that Western has a better rotation set up, and I didn't really want to deal with the 100 student increase and be in a guinea pig class. Even if they have a plan for it, and it sounds like they do, I'm sure there will be some hiccups along the way. The 100 extra rotation slots might be a problem, and there have been some rotation quality issues in the past, and 3rd year is most important for me, so I decided to go with Western. I'm sure you can become a great doctor coming from both places, but Western just felt better for me.