There are a lot of options out there, so it's just a matter of price, aesthetics, and function. I think a lot of those cases will offer room for at least two hard drives, but I'm not certain. Are you looking for a clean look, or more of a gamer-esque design?
I wish I had more knowledge on HTPC chassis though, because there are a lot out there. Thermaltake has some models that cater more for gamers, and then there's SilverStone that caters to those that want an ultra-clean design. Unfortunately, the cleaner and classier the chassis, the more expensive generally.