I seem to find that on the 762, 16AB and 16KL are the best seats in coach.. Not only do you get a mini-cabin...you have a window unlike 17, no restroom directly behind you like 18, and there is a cutout in the bulkhead so plenty of room to stretch.

If you can't snag it being a Plat, just get it with OLCI.

Not sure about the 764 though...