I've given up on IFE. I have yet to find a system which does a movie justice. I'd rather wait until they are released on disc and watch them on my home cinema set up where the picture is clearer and the sound (damn great subwoofer) is fantastic. Oh, and occasionally go see a film in the cinema too.
iPod plus book(s) for me. Even on long haul daytime flights. And an opportunity to think.