I transferred to a T14, so I qualify, I think, to give my two cents.
First, a higher ranked school doesn't mean a better education - and while it is true, to an extent, that "education is what you make of it", EVERY school has professors who suck, so DON'T transfer just for the "all-star" faculties.
Second, if you want to work in the region you are currently going to school in, DON'T transfer, this will just create alot of work for you, and you'll have to explain why you traded schools since you were doing so well, and effectively inside the region you were interested in working (however, if the T14 you want to go to is in the region you want to work in, that's a good reason).
Third, if you want biglaw, go T14... you will crap your pants at how much more opportunity there is JUST DURING OCI. This doesn't include resume drops and personal mailings. It's obscene.
Fourth, and this is a negative, people are still people. Don't transfer b/c you think your colleagues will be of a "higher sense of self". There are bozos in every school, and yes, bozos sometimes prepare for the LSAT just like ridiculously smart people wing the LSAT and end up at a lower ranked school, then wax everyones rears, leaving admissions staff scratching their heads.
Fifth, and this one is big, make sure you can get involved QUICK at the school you transfer to, or else you are in for a crappy time. Friends of mine who've similarly transferred worked their tale off their first year and now have nothing to show for it at their new schools. w/o involvement, how will you meet your new peers and build a network.
If I were in your shoes, I'd do it just b/c I'm motivated by new challenges, fresh blood, and surroundings that force me to grow as an individual.