I have a mining rig at work that I need to make a little more discrete 
At the moment it has 2 290's in it, but I plan on another 2 so I'm looking at a better case as the one I have now isn't upto it and as a full tower is hardly discrete ( it was a 30 quid ebay job and is a red monstrosity)
I was maybe thinking of the corsair carbide air 540 as it looks quite good for airflow? Any others I should look at? Keeping 4 290's cool isn't easy, but I want to so as well as I can, I accept there is only so much I can do but the crate/pci-e riser route isn't an option

At the moment it has 2 290's in it, but I plan on another 2 so I'm looking at a better case as the one I have now isn't upto it and as a full tower is hardly discrete ( it was a 30 quid ebay job and is a red monstrosity)
I was maybe thinking of the corsair carbide air 540 as it looks quite good for airflow? Any others I should look at? Keeping 4 290's cool isn't easy, but I want to so as well as I can, I accept there is only so much I can do but the crate/pci-e riser route isn't an option
.