Hi AceCobra,
if it's a daytime flight I'd just take the 77W. Why do you assume it's one of the newly refurbished? EK has only refurbished the 77Ls, all others are in the original configuration from delivery, mostly angled flat. There are various generations, the specific ones used vary from day to day. Direct aisle access is nice, but overrated in my opinion. If you choose the F seat you will most likely not have anyone stepping over you while also having direct aisle access, as the center group of seats (DEF) is often taken by couples (i.e. they'd be in DE and step over each other) or if not the center seat person tends to naturally step left as that's the door one enters/exits from and it seems to be the more natural direction to move.