From our experience...
The most reliable z68 boards are from ASUS and MSI.
The coolermaster case is designed for gaming and wont be quiet (and is a lot of cash for what you dont need, look at their sileo or silencio cases for about half the price).
look for this for the case fan, whisper quiet....
120mm Sharkoon "Golf Ball" Silent Eagle SE fan
It is however, a great time to buy RAM, load it up!
Try and find some low profile stuff as some motherboartds can have an issue fitting it in with the coolers.
www.theautobots.com / www.scan.co.uk