I second safari_7 , go for row two window. Avoid the aisle seats B and E I guess... the airconditioning vent is right on top of these and boy does it get cold. Although depending on their mood, EK will give a duvet rather than the F/J blanket, so the draft wont be much of a problem. The seats in the middle are crap as far as privacy is concerned.
unless you are getting a suite, IMHO the only differeintating factor on an older EK plane in F, is the dine on demand. Rather than the two-hour-meal-service-in-J.