If you don't get preferred for free and aren't travelling in J, I'd take 59 D and G, what are the odds someone is gonna take seat F? More space for both of you.

Or perhaps, but riskier, 59 A and C, I only say riskier because even a middle seat has a bit of a view of the window.

If you're not travelling in high season, odds are there'll be open seats left over, but those open seats are gonna be almost all middles and to the back of the aircraft.