FWIW, I wasn't especially impressed by Z68. I noticed that the drivers are all pretty much the same as for H67. A cynic might suggest that in fact there is no hardware difference between H61, H67 and Z68, just software limiting for marketing purposes.
Frankly, if you're not going to use a 3rd generation SSD with 6Gb/s SATA, there is NO return on the significant extra cost over a H61 that I can see, and definitely none over a H67.
IMO, the SSD caching capability is just more Intel farting - I mean marketing. If you can afford their ridiculous 20GB SLC, you can afford a dedicated SSD boot drive, and the former can't hold a candle to the latter.