I *might* consider it if it were around $700, but not a penny more.
I'm with you. At about $1200 CAD I'd be seriously considering that 6950x because it's a MASSIVE upgrade (about a 90% performance boost from my current system, holy crap!) and fits my use case exceptionally well. That would put it at 2x the price and x2 the performance of my current CPU. I could justify that.
At $2200 though, it's just getting a little silly. I'd honestly be scared to build a computer worth $6-7000. I'm sad enough when a $250 graphics card or $100 hard drive blows up, let alone a dead $400 motherboard that kills a $2200 CPU. I don't think I want to be part of that world.
I don't really like the thought of spending more than about $3500 on a computer. After upgrades, that's about what this one cost me and that's the upper end of where I'm not scared sh!itless of things dying. Any more than that and I think my life would be too full of anxiety. 
Oh, LBTLover: You mentioned earlier you weren't considering an upgrade until you could bump up to 128 GB of DDR4.
The low-end enthusiast i7 (the 6800k) supports up to 128 GB of RAM now if you're still considering an upgrade and not wanting to drop insane amounts of cash on a CPU you don't need. 
I've built quite a few $5,000+ machines in my time, and yeah it's scary. If you make a mistake or screw something up, that's a BAD deal.
I recently had a customer that tried to build his own computer. He bought 4x 780ti graphics cards, a sick CPU and motherboard, and a bargain basement case. The problem is, he tried to run all that on a cheap 700 watt PSU. The PSU blew up the second he turned it on and it took out his motherboard and 3 of his 4 graphics cards. And get this....he bought some $60 Crucial memory to go with his sick setup and put the whole thing in this horrible cheapo case.
You do NOT want to spend a premium on some parts, then cheap out on others, throw it all together, and expect to get a good stable system. It just doesn't work that way. So after spending like $6,000 already, he had to pay another $3,500 and paid me to rebuild it all in a decent case.
Needless to say, next time he wants to build his own computer or do any upgrades, he's just going to take it to me.
As for upgrading my current system, I could do that but I'd also have to get a new motherboard. I'm not in the mood to drop $1,000 for a modest performance increase. I'm going to wait until the next socket type comes out. My highest end computer has an LGA2011 socket, but I also have a system with an LGA1150 and an LGA1155. I'm going to wait until the next socket type comes out, then I'm upgrading the motherboard, processor, and memory on all 3 of my main desktops. I use a Corsair AX1500i power supply on my main system, and an AX1200i on my other 2 systems. This is my main rig that does 4k gaming and connects to my 4k TV:
I built it about 2 years ago and it's been a great computer. It currently supports up to 64GB of RAM with the current motherboard, but it's DDR3 3100Mhz.
One of the best things about doing computers for a living is when I upgrade my motherboard, processor, and memory, I can build another system around those parts and sell it. Just get a decent case, a good quality power supply, and a mid range graphics card and you're good to go. Throw in a cheap SSD and you're rocking a pretty nice system. In the end, I usually only end up paying about $100 to upgrade my system after I sell off the old parts that I build a new system around. It's great.
