Agreed with aigo. If I was getting a new case right now I'd probably go with the Define R6. I have nothing but good stuff to say about the Fractal Design Define S I used to have, and I actually liked it better than the Phanteks Enthoo Luxe I have now.
I wish I could recommend the Luxe, but it's had a few issues that prevent me from doing so. Overall, it's a very well designed chassis, but the build quality and fit and finish are lacking. A number of the threads are poorly tapped making them either too tight or completely unusable, the bottom rear side panel thumb screws came bent (as if the case had been dropped), and now it has developed a front panel rattle that drives me nuts (I have to give the front a swift whack every now-then to make it shut up). I have applied automotive sound dampening to the solid side panel and inside the front, and it still has not stopped.
As far as the Corsair Air 540, it was on my short list of cases a few years back, but after checking one out at my local Fry's I came away unimpressed. Well thought out case, but the only word I can use to describe the build quality is "flimsy". Everything about it just felt cheap, and all the plastic drive cages had been destroyed on the display model. Sure, you'll be more careful with your own case, but we have the technology to make virtually indestructible plastic point-of-sale packaging, why would Corsair use brittle plastic on the drive cage/sleds?
Other cases to consider:
BeQuiet Dark Base 900 or 700
NZXT H700i
Fractal Design Meshify C or Define S (I added two extra 140mm fans up front for airflow on my Define S)
Lian Li Alpha 330, 550, or PC-011 Air (pay attention to the ≤155mm cpu cooler clearance on the PC-011Air)
Cooler Master H500M
HardwareCanucks, Paul's Hardware, Bitwit, and GamersNexus have youtube video reviews of most of these cases.
..but, yeah.. for a good, quiet case that won't break the bank, the Define R6 is probably the way to go.