Nice work on the MCAT. I was late to the decision to apply so I had only 3.5 weeks of prep and hadn't taken a college class since 1998. I still pulled out a 30 so I think I'm in good shape.
I have checked out thenewX.org as well, but I'm limiting my exposure so I don't start buying things I can't afford yet. Today I did a trail that confirmed for me that I probably won't go up in tire size. Last weekend I went off roading with my girlfriend and it was mostly dirt roads with a few technical sections. Today was passable, but very technical, no more than 5 mph over the entire stretch it seemed. The dogs were just getting tossed around in the back and because we were going so slow, we weren't "exploring" as much because it was limiting our total distance travelled. Meanwhile the X handled it great, but we are more into less technical exploring and the stock OR tire size was just fine for today even.