I'll add my two cents:

I basicaly had a similar choice, I built my bankroll playing live casinos during summers, home games, and occasional trips around the south during college. At the time I was conflicted about going to law school and playing poker. I had enough hours and results to where I was confident of my ability to grind out 90-160K year at the stakes I was playing with room for improvement. I was never into the trading thing but had alot of exposure to it (Dad owns a hedge fund, Brother trader at another hedge fund). I decided to take the summer and live in LA playing live with some of my poker buddies with trips to LV. I'm glad I did because it gave me exposure to a true professional poker players life style. At the end of the summer I went to law school. I decided on law school for 3 reasons. First and foremost, I had already met the girl I was going to marry and despite the constant support I got from her I felt I needed something more stable to be fair to her and later my children. Second, Poker is an isolating profession. I had two great friends with me from school, so I had an amazing time in LA however, had I not I doubt I would have known anyone. Hanging out in casinos you meet people who you become friendly with but rarely become friends. For me as a overall shy person I don't think this life style would generate enough of a social life to be fufilling. Finnally law school had always been something I had wanted to do. I had legal work experience. So i knew I could be happy as a law student and later a lawyer.

The main point I want to make though is if you are considering going to law school you must be fully committed to being there. As a 1L I can tell you if you are not all in to being at law school you will not excell and be miserable. Law school is very different from college. The workload is much greater and you cannot slack at all. I know that seems cleched but you must be really self motivatde when after a long day in class and doing reading for the next day you must further prepare for exams a month and half away (I never would have done this in undergrad but it is nessisary to do well at law school). Also while poker players have more exposure to this, the entire culture of law school is highly competative. Your best law school friend would happily cut your throat and you would do the same. The culture makes you that way. If you cannot get along with A type personalities, handle professors trying to embarass you infront of your peers, or being constantly reminded that your first two semester exams will make the difference between endless riches and poverty beware. If you can however law school is increadibly interesting and can be a great expereince.