@pibbur who: Excellent choices there. My second PC also lives inside a Coolermaster HAF-X. It's a little dated case by now (unless there is a newer revision?) since it doesn't have real USB 3.0 ports on the front panel but then again I've never had a use for more than the board's USB 3.0 headers either so who cares… it's definitely a decent case for a well ventilated high end rig.
I'm constantly monitoring my VRAM usage via MSI Afterburner and just about the only game I've ever seen use lots of VRAM is Star Citizen which is in alpha and far from optimized yet. Skyrim pretends to be using a lot but that seems to be allocated VRAM and not actually used VRAM.
Granted, I have not played Shadow of Mordor yet which IIRC was the first game to require (or recommend) 6GB VRAM for ultra textures but that reeked of poorly optimized console port rather than a real technical requirement.
It's actually amazing how many games, even with the highest settings in 1440p (my monitor's native res) and AA cranked up all the way, use fairly little VRAM.
For example Assassin's Creed 3, which I'm playing right now in full DirectX 11 glory with TXAA, HBAO and all the bells and whistles turned to max, is using ~1500 - 1800MB of VRAM max.
Or Risen 3… PB's engine leads a very frugal life at requiring just over 1GB (often times it's in the 850MB - 1GB range) with everything maxed.
VRAM is vastly overrated. This might change with more SoM-type poorly optimized games of the new console generation where the devs can't be bothered to save VRAM (like "hey we got 8GB unified RAM so why waste time optimizing for nothing"). But for now 3GB - 4GB VRAM is just fine and it's reasonable to wait until 6GB or 8GB VRAM cards become the norm rather than plunking down huge amounts of extra cash on lotsa VRAM you'll never need.