I flew KOA-SEA-MSP on the 753 a few months ago. 1A/B are by far the roomiest, due to both the cutout in the bulkhead and the distance between the seats and the bulkhead (not the same for the other side of the aisle). Downsides are the lack of underseat storage (not a big deal in my opinion), and lack of a footrest (more of a deal if you plan to sleep).

Probably the biggest advantage was getting in and out of my window seat a few times during the flight without disturbing my partner sleeping in 1B.

Other than the unimpressive amount of recline, it's a pretty comfortable ride.