For the average passenger the 787 and the 350 are exactly the same - sure, there are differences but they are minor. The main advantage for me of the 350 and 787 over any other aircraft is the air quality - not being so dry.

As far as I have experienced, the QR 'bar' on anything other than a 380 is little more than an ornamental sideboard so don't fret about missing out on that. The 777 is a really good layout with a great feeling of space compared to the 787 and 350 and is good for couples provided you are seated in a pair of seats.