Congratulations on doing so well your first semester!
I would say that whether you should transfer depends on what you want to do after graduation. If you want to go to an uppity, huge firm, then *maybe* it would be a good idea. However, if you are at or near the top of your class, it's not necessary. If you have a good chance of making law review, you may just want to stay where you are.
I don't know, of course, where you go to school or where you school is ranked, but I personally think that the rankings are somewhat a bunch of self-indulgent crap. I went to a pretty new, third tier school (just over 20 years old), and don't regret it for a second. I still laugh at all my co-workers and former co-workers who went to much "better" schools and have much larger student loan payments, but the same job I have.