You'd hear of Norco if you're on a budget, they're one of the many cut-rate brands. Supermicro charges roughly three times the price for enclosures, which do get the job done if you aren't bitten by firmware issues, but are by far not a budget brand compared to the competition out there.

I've actually considered some Norco enclosures in the past for a hobbyist project, but I had concerns over their hot swap backplanes -- mainly, a lot of reliability issues reported. Catching on fire pretty much settles it!