Thanks for all the responses.
I'm not intending to set up my own practice, but rather to be well rounded in a variety of areas. I really want to be an SEC attorney, but I am also considering the tax attorney route at a Big 4. My wife is a tax accountant at a Fortune 300 company, and what she has learned from her co-workers is that Big 4 really likes the JD/CPA combo. The CPA is apparently preferred over the LLM because the CPA is much more broad (it covers finance in addition to tax). You don't even need the license necessarily - just the fact that you passed the exams apparently does wonders for your salary and career opportunities when you also have a JD. Also, if you aren't getting the license right away, you can take any of the state exams. Some have less stringent course requirements. New Hampshire, I believe, only requires 12 credits in accounting in addition to the 150 hour basic requirement. So I was thinking of taking those classes after I pass the bar (or maybe auditing them at my school while in law school) and then studying for 6 months and taking the CPA exams.
All this is a lot of work, but my thinking is that in this competitive environment with way too many young lawyers, this is a good way to set yourself apart. It seems like there aren't many people who have gone this route yet, so less competition. Because it is so much less common, you really stand out. I'm looking eventually to be on a Board of Directors for a company some day, and was thinking this would be a great way to get on that track (especially after spending time at the SEC or Big 4).
In any case, just something to think about.
It does look like New Hampshire's requirements to sit are not as great as some other states. You don't need 150 hours, but in addition to the 12 hours of accounting you need 12 hours of other business courses. Good luck if it is the route you decide to take.