UC seats for a couple

Hi
Looking to book a few nights in New York with my wife for her 50th, just wondering what seats (rows really i guess) people would recommend for a couple (who are currently on speaking terms) on the A330 or 350 having not flown on either of those?
Looking to book a few nights in New York with my wife for her 50th, just wondering what seats (rows really i guess) people would recommend for a couple (who are currently on speaking terms) on the A330 or 350 having not flown on either of those?