If there's definitely no chance of a 4970X, I'll buy a 4960X right now, otherwise I'll wait and probably give into the temptation of Haswell-E, which I'm almost certain I'll live to regret.
Current LGA 2011 platform should be worse. Because the X79 Chipset is from the paleolithic era, most of the current features like SATA-3 and USB 3 requires TONS of extra controllers on the Motherboard. That adds both cost AND complexity - the latter adds even more chances of issues, bugs and quirks. I would prefer to wait for a clean X99-based Motherboard instead of something that need tons of third party chips to not feel outdated.especially given that Intel is developing a track record chipset bugs and that motherboards in general are such a minefield of issues these days.