AMD has been close in the past....
I built a dual processor, quad core (8 cores) E5420 (clocked at 3Ghz), with 1Gb Gfx, 16Gb of quad channel fully buffered dimm, 2x 1Tb F3s all brand new except the ram, with a Win 7 ultimate licence for less than £800, it's faster than skulltrail with a pair of QX9775.
You can't build anything based on AMD for anything like this price with asimilar performance, if fact you'd struggle to build anything faster AMD period, you'd need 12 and 16 core monsters, and the mobos are just too expensive.
AMD still own the market for budget procs, you do get more bang for your (budget) buck, Intel don't really compete at the sub $100 chip, but that's because the quality of their chips is exceptional (kind of the point of the article), you find so many Intel chips that overclock really well because they are the same chip as the higher end one, identical dies, just clocked lower, the volume that they can knock out means that they have no problem repackaging a high end chip as an underclocked lower end chip, take my E5420s they clock identically to E5472s, no voltage change, no exotic cooling, 80w out of the box, video compression and non linear editing is a dream.
There are however some "sweet spots", as Lionel points out, an AMD x4 965 is a very quick proc for the money, although the i5 760 costs 10% more and is 20% faster, I suspect that Lionel is smug because he got a better deal than someone paying old i7 prices, chips drop in price all the time, you have to shop around, I'm sure that someone who bought an i5 and is clocking it at 3Ghz is feeling smug compared to the AMD owners that can't overclock at all, for $200 you'd be looking at overclocking a six core AMD to get close (if the software takes advantage)
I upgraded a system to i5 750 @3.4Ghz plus motherboard with 3Gb ram for £255, probably faster than Lionels upgrade, but almost certainly better "bang for your buck", a few weeks from now there'll be something faster and cheaper.