But seriously, just straight up tell me how much would it cost, no details and stuff just give me a number please.
To max Crysis 3 at 60fps from the sounds of it might take a couple grand right now, but the point of the game's settings is future-proofing. No need to play on max day one, just like the first game.
In any event wait for the next consoles to arrive before doing anything, they should let you know how powerful a PC you need to last a while. That's my plan, my PC is about 3 years old now and I will upgrade in another year or so when I know the specs of the next Xbox.
At some point future proofing proves to be a suckers bet. I'm not sure what that point is precisely, but if you're spending $2k on a rig, you may very well be better off slashing the price down to $1k and just buying a new rig sooner. As you'd probably be getting more than half the performance and likely enough performance to play for a couple years anyways.
Traditionally, that last bit of performance is a huge portion of the cost of the machine.
Obviously though, if the OP is dead set on maxing things out, that's not going to be a consideration. I've personally never understood the need to max things out. Well, at least since the late '90s when that would be the difference between playable and borderline playable. Unreal, I'm looking at you.