Do you see the first line in my signature? I would never spend $500 on a case, even if everywhere else its $700. More so if I think its ugly, or if it can't hold the big cards. If you think it looks great and will never buy a long video card then its the case for you.
Thermaltake says a 590 will fit.
Jeez, you've got a budget. Even so, it would probably be worth going 3x580 SLI instead of 2x590. Around the same price, and better performance. Can the lvl 10 fit 3 cards?