$2000 Gaming Build

At that budget, and if you don't wish to do a multi-GPU solution, you're looking at a pretty straightforward collection of core components, and then a lot of wiggle room with respect to quality-of-life and/or fluff stuff -- large SSD(s), expensive chassis, a high-end monitor*, that sort of thing.

(The problem with high-end monitors, of course, is that the bigger the display, the more horsepower you need to game on it at native resolution, and thus, the less mileage you'll get out of your core hardware. So it's a bit of a self-sustaining money pit, one that I'd personally avoid, but that's up to you.)

Or you could put together the core system with modest QoL/fluff and save some cash for later (put it towards that second GPU you mention down the road, for example).

All of that said, the basic configuration at $2,000 basically builds itself: i7 3770k, mid-to-high-end z77 motherboard, 8+ GB of memory (of a reputable brand, but it doesn't need to be premium stuff; personally I'm a Kingston guy), and a single HD 7979 GHz edition. Your budget is very high for a dedicated gaming rig, but it's not quite high enough to justify extreme high end hardware (LGA 2011 motherboard/CPU, GTX 690 or Titan). Some people would probably even tell you that a 3770k is overkill, but personally I don't see why anyone would turn down Hyperthreading in a $2,000 rig. Eventually those extra (virtual) cores will matter in games, even if only a little bit.

Cases are largely subjective. You obviously have the cash for a $100+ case, and most any case from a highly-touted manufacturer in that price range will likely satisfy you. I'm talking brands like Antec, Corsair, Fractal Design, Lian Li; even Rosewill's turning some heads these days -- but anything I tell you case-wise will inevitably be second or third-hand information. If you really care about the case, I urge you to read reviews on sites like Tom's, Anandtech, SilentPCreview, Techreport, and Hardwaresecrets.

So I s'pose the upshot of all of my rambling here is that your request is both straightforward and subjective. Perhaps a little more info about your specific preferences would help us craft further recommendations.

As Fulgurant said, without a CrossFire/SLI, at this budget point you have a lot of disposable currency. Are you sure that you don't want a multi-GPU configuration and that you want to spend this much?
Secondarily, do you actually have access to a Mircocenter, or was that just the tendency of Part Picker to chose the lowest-priced vendor?

No love for NZXT? The Phantom line has been getting great reviews these days.

Heh, I thought of NZXT and Silverstone after I posted -- both good choices. Was just tossing out examples.

Fair enough. It's hard to list all the manufacturers making quality cases these days, something I am absolutely thrilled about.

Honestly, if you're only at 5% over American prices, you are quite lucky. I helped out a South African fellow recently, and as I recall his prices were over 33% higher.
Ah. Were some of the brands I used in my suggestion not available? I can suggest alternatives if that's the case.

The Ghz. Editions are superior to the normal cards, but normal 7970s can be overclocked to the point of having the same performance. A major reason I picked those particular cards was that they have Sapphire's Vapor-X cooling system, which is quite good.
850w is funtional, but I was trying to keep costs down. For my own 7970 CrossFire, I use a 1000w PSU.
Honestly, I use and recommend NZXT products so much that my knowledge of other high-end cases has somewhat atrophied. I could dig something up, but you'd likely be better off seeking someone else's advice.

I have a deep personal love for SeaSonic, so my recommendation for a 1000w PSU would be this: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151105&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

Edit: A glance over the Newegg product page shows an oddly high count of negative reviews. Though that's not the case everywhere (the Amazon page has 19 five star, 1 four star, and nothing else), that could well be a warning sign. It's well-reviewed from the professionals, but you might consider this as an alternative: http://www.newegg.com/Product/Product.aspx?Item=N82E16817151110

For what it's worth regarding Corsair, SeaSonic makes most of their better PSUs anyway. Honestly, as far as manufacturing goes, they're the big name for quality. That said, that specific PSU seems to have an oddly large number of problems, so the 1050w would definitely be a good alternative.

It was my pleasure to help. There will probably be a few shake-ups in prices by that time, so your build will need a little updating, but the core of it seems quite functional (not to toot my own horn ). I look forward to helping finalize it.