If you think David Fincher (the guy who did Se7en, Fight Club and The Game) is a good director, you definitely should. Or if you liked Requiem For A Dream, which was also by Darren Aronofsky, Pi's director. Even if not, Pi is still a very interesting movie. It's basically about a xenophobic mathematical genius who is trying to find a mathematical pattern in the rise and fall of the stock market prices, and consequently, a pattern for the entire universe. And his descent into madness, fear, and paranoia.
"You just had a glue OD, and those are pretty regular in my life. So here's another lesson: don't huff too much glue, or your night sucks."