Is the OWC memory for the MacBook Air really as great as they say it is. I was going to get the 256GB air from Apple, but now I am thinking about getting the 128GB, selling the 128gb thing on Ebay, and getting the OWC 240GB? Is it really going to be worth it to do that? What have people that have them said? Also, didn't Apple recently start using faster ssds anyways?