I'd go 53 AK or 59 AK - ie Uper deck, window, but WITH aisle access thrown in.
So you get best of everything - window seat for geeking out, side bin storags for extra room (good if working on flight). And not having to step over anyone.
As a rule the divider is rarely a huge deal on these flights. It will probably go up quite quickly unless you and your neighbour are keen to chat. The CC will have to lower it for service most likely, unless you're in an aisle access seat as mentioned (and even then they don't always think that way) but it's hardly the end of the world.
It's all very much about personal preference but for me I hate aisle seats in CW and love the cocoon of the window seats. So it's a no brain choice.