Atvchristmas I bought my wife an 11" Air.. Now we're coming to St Valentines and I've been looking at how she uses the machine. (almost always at home but in different rooms, sometimes at he desk other times on her knees) I'm thinking of getting a protective cover or case of some kind. One where she can use the machine without taking it out of the cover. Obviously a cover of this type is only going to give protection against scotches or finger marks on the machine, and that is fine. I'd like it to look good, be of reasonable quality, but not cost more than the machine What experience or recommendations do you guys have?