Those are the drivers I'm running. I had to reinstall Windows a few weeks back and I gave those a shot. Works with no problems. Keep in mind that the best storage controller Intel makes is the ICH10R. This chipset has been out for quite some time now. So the software isn't looking to see if you have a Z68 board, it's looking to see what controller your board is using.
Try it in AHCI and see how it works. The good thing about installing AHCI is you can always later try IDE mode without any issues.
One last thing. Are you running your RAM with an enhanced memory profile? The RAM I have says that it runs at 1066 (it's DDR2) with 5-5-5-15 timings. That may be the case if it was the only RAM in the machine. But to keep it stable I can't run it at 1066 and I can't use 5-5-5-15 timings. Right now the RAM is running at 950 with 5-6-5-18 timings. Just something else to take into consideration.
Last thing I have right now. Have you checked for an updated BIOS?