Why don't you save your money for i9 or Sandybridge? 4 x 4870x2 is insanely excellent at least for another 3 years.
A lot will depend on what exactly comes out and how much money I have when it comes out. I don't think I'll be getting i9 unless it either performs better than I'm expecting right now, or is cheaper than I'm expecting. Sandy bridge is a distinct possibility. If 4GB DIMMS get cheap enough, I'd seriously consider an upgrade to 24GB as well - that could prove quite useful for some of the actual work I use my computer for (as opposed to gaming).
As for GPUs, I agree. 2 4870x2s (4 GPUs total, not 4 cards) is quite good for now, though I may reconsider if enough DX11 stuff starts coming out. I'm not hurting for speed though. These new cards look amazing though (despite being quite sizable). I'm glad to see the built in overclocking headroom - the 4870x2s don't have a whole lot of room for overclocking.
Oh, and 1.384 is CPU-Z. I don't remember what it's set to in the BIOS.