The 757 F is lousy. My wife actually prefers 757 coach to F (she thinks the seats recline more, is too thin to care about seat width, and has enough taste to know that you're better off bringing your own food on than eating the pasta bowl up front, although I guess they've switched to a Hawaiian themed menu since our last trip in September). I don't agree with her assessment but the point is that the 757 leaves quite a bit to be desired. Go 767 all the way (and I'd vote for going with the wife over accruing miles on your carrier, but hey YMMV).