The above link should help you determine about the fitting dilemma.
The Fractal Design Define R3 is surely a very nice case. Though IMO, its better suited as a HTPC case with excellent noise immunity rather than a gamers case with need for high performance airflow.
Well I plan to remove some of the removable sound dampers, and installing fans or just leaving them out so air can flow better in. I've also read that the cooler that comes with the deal, is pretty decent. So it should keep the CPU cool enough, and I don't plan to overclock the CPU that much or at all.
I really like the simple outside design, the larger fans you can install or that comes with it. And just the layout of the case. If you know of a similar case, let me know and I will take a look at it.
And thanks for the link, was really helpful, considering my build is almost identical :O