I understand that, my current 5820k setup costs exactly 807.39 + vat, it's a render node so it does not have a powerful GPU at all.
Anyways, I would be pretty happy having this same setup but instead having a standard HDD I would opt for SSD, a powerful GTX (not a Titan) and that's it, the Motherboard it's an Asus X99-A
So I doubt the improvement in rendering speed could be a lot greater, the same render node cost with the 5960x is 1319.78€, so 512€ more, so you get in the same machine 32% more performance for 63% more price (based on the benchmark results we saw here).
With that said I'll shut up already XD I just want to make numbers clear for people that want to acquire a machine, maybe someone could prefer more threads, more power even for more money because they can't afford a farm, or they don't want nodes, or because they need more workstation horsepower, and may be people that prefer to have two nodes working side by side and have a bit less workstation horsepower but a lot more render performance, it's up to everyone :D
In any case, no doubt that the new Haswell family it's outstanding!
Cheers!