Also note the second one is based off the Sandy Bridge architecture, which has a flaw in the chipset on the motherboard. The SATA2 interface will degrade over time and can ruin devices plugged into them. The SATA3 interface does not have this problem though, if the board supports it.

Intel has found the solution and is releasing new boards, that should be out sometime this month. So, if you go that route, it may be best to hold off till the new boards are out.