Guys and gals, I have a MBA Rev C 2.13, 128 SSD and my wife has a Rev A, I used her computer the other day and it is a slow horse. I was thinking of giving mine to her and purchasing a Rev D 2.13, 256 SSD, 4 GB to my own use. My question is for those of you that have upgraded it. Is it worth the upg even that the new one doesn't have an illuminated keyboard? Would you wait another 6 months and see if the Sandy Bridge ones come to life? Should you wait for Lion to come GA? A Windows machine is out of the pic, since I need to use my 27" ACD that is less than 6 months old. I would love to hear your opinions about the subject. Thanks.