Ask a senior partner/director at your firm. Many biglaw firms will cover tuition for their associates pursuing LLMs.
Outside of that, you should recognize that the NYU LL.M. program and the NYU executive LL.M. program are not the same thing in the eyes of many. I think there is a strong argument that they are the same (viewing class online is not really that different than sitting in person), but some tend to think that the e-LL.M. program has not yet proven its value so it has not earned the same reputation as the "real" NYU LLM program.
Of course, you have a job secured now... but in this current economy you should be sure to consider the long-term marketability of the degree... and whether you feel the e-LLM will be as marketable as the "real" LLM.
That being said, I would suggest (after consulting with you firm, of course), focusing on Gtown. Florida is a great school, but giving up a job in this economy is probably unwise. NYU is the consensus #1, but Gtown is not too far back. Plus, consider all of the benefits of attending in person... studying in library, professor office hours, all the things that would be more difficult in the e-LLM program.