Need some advice for something that even after some searching here I couldn't find....

Due to the lack of decent award availability for September (couldn't find a flight home without making 2 stops) I was "forced" to buy an economy ticket. I didn't want to spend my M&M miles for this leisure trip and I didn't want to wait for some additional capacity at T-14. All is not lost however since I managed to get seat 22A on the 747-8 for my return trip.

The outbound is MUC-LAX on an A340-600 (LH452) and I cannot seem to find what seat would be best... the seat maps that I can find all start economy at row 26 but when choosing a seat I get a seat map that starts at row 22 where 22-25 are show as "preferred" and 26 is the emergency exit.

Any ideas what (window) seat would have the most leg room?