The low end 760G chipset board ain't exactly any better. Supporting the CPU does NOT equal to good performance. If chipset dont matter, than motherboard manufacturers like Asus, MSI and Gigabyte much be dummies paying AMD so much money buying the new chipsets. So I would say motherboard quality the 760G and H61 is a draw, but on the CPU aspect the Intel has a clear win.
"So maybe piledriver may be like the p2."
Playing catch up...that's what it is. Bare in mind that Phenom II never did catch up with even first gen i5/i7. Looking at Bulldozer performance, it would be miracle for Piledriver to catch up with SandyBridge, let alone exceed it.
Investing in an new AMD build and hope for that Piledriver will rock? That's like taking an gamble against the odds...just look at all the Phenom II owners that upgrade their perfectly fine, working AM3 board to AM3+ board with 9xx chipset and bet on the performance of Bulldozer, waited for 9 months delay, and where did it get them? This is where it got them:
http://www.youtube.com/watch?v=SArxcnpXStE
The point is SandyBridge ALREADY offer great performance that people can SEE, where as the Piledriver is still an uncertainty, a big question mark, a bet against the odds...much the same as Bulldozer before launch. Also, it is still not gonna be out a quite a long while, and it would most likely be more expensive than the i5 2500K. Let's face it, it ain't gonna be cheaper than the Bulldozer.