I know you said that you like Corsair, but if you get either the Graphite Series or the Carbide Series with the mesh side panel and the huge intake fan, you have to remember that these cases do not have a side filter and you will be drawing in lots of dust.
A number of people have already been asking about Demciflex dust filters.
It is a pity that such great looking cases do not have a dust filter.
The downside to the Obsidian appears to be that air flow is not great.
If these little niggles don't bother you too much then, I really like the Corsair 500R, on the other hand the Coolermaster 690 II advanced is also a nice case.