I vote Michigan... personal preference and you're above their LSAT median. Though if you don't have a preference perhaps you could just do them all early decision and see which one accepts you first. (Don't choose cornell though - Ithaca for 3 years would be unbearable) Perhaps add Columbia into the mix... if you apply to all of them ED.
I would not recommend you apply ED anywhere to be honest. With stats like yours, you have a wide range of possibilities, and it would be a waste to apply ED somewhere unless you really wanted to go there. From the fact that you're asking for suggestions as to where you should apply ED, it's obvious you're not overwhelmingly in favor of a single school. That being said, I would definitely recommend applying EA to Georgetown, Penn, NYU, and Duke. You have a shot at each school (NYU would be the most difficult of those to get into, and you'd probably be deferred to regular decision). Give yourself the widest possible choice, and you'll buy yourself more time to figure out where you want to go. A lot can change over the course of a semester, and so if you apply to one school ED, you may realize you prefer another school later on, but are now obligated to that first school. Good luck though. Your numbers are solid.
Well, perhaps it isn't allowed... but I'm sure it's done at times.*I won't recommend that as a course of action anymore - As for me, I'd like some options so I won't be doing ED anywhere.
I'm trying to decide the same thing and lately I've been leaning towards Michigan (my numbers are 3.81/167). It should be noted that Cornell does NOT have an early decision option, so your basically deciding between gtown and michigan.. I started a thread about this earlier! The general consensus (sp?) on the thread was that Mich was the better school. But don't go by that. I did research and realized there were aspects about Michigan that I loved, more so than Gtown. However, I'm still not quite certain about this whole ED thing.. (it could affect scholarships).