Finally, another feature of a Z68 chipset is known as SSD caching which is where it allows the use of a small (say 10 or 20 GB) Solid state hard drive to act as a cache for a larger ‘traditional’ hard disk. If you are already planning the use of a Solid State drive this feature is redundant.
3. MTBF is a fake statistic in the sense that we really know that no units are likely to last that long. While it is an "indicator" for relative comparisons, these comparisons are based upon many assumptions. The SSD market is just to young to assume and reliable "absolutes".
4. There's dozens of em. I don't bother much anymore. Just type "Buy [insert product name here] in a web search window and you will come up w/ nextag, cnet and many others.