Hey guys. I'm just getting started with my freelance design project and I desperately need a tablet. I haven't had much exposure to one before, but from what I've heard, they're life changing. Problem is, I have no idea where to look.
Let's say, hypothetically, that I have unlimited disposable income. What brand / series / etc / etc would I get the best bang for my buck?

I work on a MacBook running OS X Snow Leopard, if that matters.