Can anyone tell me which are the best seats for a couple travelling together on an American 777 in first ? My parents-in-law are travelling LHR-JFK in first and the cabin is completely empty at this point so we can choose any seats !

Seatguru has the individual seat comments but since its the 1,2,1 config of sleeper seats, I'm not sure where they would be most comfortable (having not flown AA first on 777)

Thanks in advance