I think 64J is OK.

The problem with both 60B and 64B is that the toilet is on the starboard side, and the door opens towards the centreline of the aircraft. That means that light spills out across the aisle towards those seats.

64J doesn't have that problem, although I wouldn't rush to pick it if I were travelling on my own. As a couple, however, 64J goes with 64K which is (for many) a very nice seat.