Awesome! Wow, didn't know the pay is so nice.
Top accounting firms pay a lot. However, it is a lot of work, and at the top levels -- a lot of responsibility (and liability
, think Arthur Andersen).
It is not an unrealistic expectation to pull 60 hour weeks during the first years on the job (at least that's how it went ~10 years ago, I hear Gen Y is resisting the trend ;-D).
It's also worth noting that a lot of the big firms in the field have an up-or-out policy, so they're likely to counsel you out if they decide at some point that you're not promotion material.
In a nutshell, it can be a very rewarding career, but I wouldn't recommend it to someone who doesn't understand or enjoy accounting as a discipline or working with people. Not that a kid in high school can know that yet, but these are things to keep an eye open about to save yourself a lot of frustration.