I use the official Sony cover on my 650 - the one without the light (didn't like the weight of that one).
Expensive but great. Much easier to hold, as said earlier the bevel is a bit small w/o a cover. Seems to be good quality, tho I don't fold mine back and will reserve judgement on the lifespan of the plastic prongs that secure the reader. There must be little magnets in the corners to keep it nicely shut?
