nu does have an exclusive contract w/ kaplan. i heard they are hard core exlcusive, no one allowed to even post flyers on the campus! and i think kaplan sucks!!!
if you have that high a score, i think a class is goign to be a waste of time. private tutoring is probably best. kaplan offers some private tutoring, but its expensive and they suck. get prepped has tutors & i heard they are pretty good; and i went w/ a course and private tutors for Expert LSAT but they are a regional company (upstate ny area) so i don't know if that would help. but stay away from kaplan!