There is absolutely no need to get the i7-980X CPU mate. There really isn't. Look at 95thrifles build he made. That is a LOT more sensible.
Spending a lot of money doesn't mean it will stay current for longer. Your best bet, is to spend slightly less, and then you have an excellent system. Then, you still have the cash to be able to upgrade. That is much more sensible than blowing 3k now, and not being able to upgrade for 2-3 years because you spent your entire budget.
The electronics industry changes so fast, that what you buy today, will always be out of date tomorrow. That's how it works. So don't blow 3k on it. Spend the 1.5k or whatever, then upgrade every year. As long as you have a solid foundation (PSU, case, monitor) you will be sorted for a while. The i7-950 should last a good few years still with good performance. And the graphics will be out of date within a year anyway. You could buy a system almost as good as yours, for the price you are willing to pay for the graphics alone! The SSD will help massively, and the NVIDIA cards ability to utilise CUDA may help depending on what programs you use.
About upgrading your processer, the 1336 socket will be old news soon, when Sandybridge comes out. Far being buying the very capable 950, and sticking with that for a few years, then upgrading again.
This IS good advice, and good advice should not be ignored.
In this instance, as you mentioned they were "dodgy", I thought you might be able to provide some evidence, as Googling "AX1200 problems" returns a stupid amount of results.