What is your cheapest one? I'm going to Europe in a few days and will be spending a couples days in the air between Glasgow, Paris, London, and back. I was planning on sleeping on the plane, but I've been flying on planes for since I was a few months old (including a few trips to Europe and another to Australia) and I've never gotten a single wink on any flight ever. So I'll probably been awake for all of them and will probably want to catch up on some TV shows.
I need a functioning CD/DVD drive and a battery that can hold at least more than an hour charge, WIFI functioning is a plus.