Oh, and yes, you can get just about any case. Any new mobo will come with a special plate made for that mobo's particular port configuration.
Beware, though, you really do get what you pay for.
This here is a $45 Fry's Electronics case, and, well, it's a bit flimsy. The sheet metal it's made out of is about 2 gauges thinner than I'd like but it's served me well. (It's dirty, I know. Can't be helped.)
Oh, and avoid case/PSU combos like the plague. I lost a CPU from one of those. Don't make the same mistake I did.