That's still $100 more than you can get an 800D for, and you could argue it has less features (no hot-swap bay, no tool-free optical drives, etc).
But it doesn't really matter because they have a different business model than we do. They're basically a boutique custom build shop with a very specific series of cases, and they sell direct to consumer, so you have to buy from them directly, as far as I know.
Corsair sells primarily through retail and distribution. The tradeoff being that there's a double margin stack (we make our money selling to guys like Newegg and Fry's and Scan, they make their money selling to you) but you can buy it just about anywhere so it's more convenient and there are guys competing on price.
I'm guessing if CaseLabs had to sell their stuff retail to the same number of outlets we did, their cases would be a lot more expensive.
I do love their stuff though - one of these days I'll buy one for competitive analysis. Heh.
As you said. different business practices I guess