ABS Tagan Black Pearl. It's an offshoot of the Lian-Li PC-V2000, and it only cost me $100 shipped (though some lucky folks got it for a mere $90 shipped), which generally isn't going to happen with a Lian-Li-branded case.
It looks pretty sleek, too. None of that tacky/gaudy/ricer look that plagues a lot of cases these days. Airflow is good, it's spacious to work in, and I can't really think of anything more I'd ask for...well, except for some sound dampening to keep the DVD drive from making a racket once it spins up.