The other thing to be mindful of when taking the middle seats is that there is a very strong possibility that you will not be served simultaneously or even close to it. We have had only a single BA flight where the crew were able to deliver our meals at the same time (and, to be fair, they did an excellent job - it was almost perfectly synchronised) although we had to specifically ask for it.

Iberia, to give credit where credit is due, have always served us as husband and wife without any prompting.

Club Suites are very much geared to solo travellers, even in the middle seats. I felt that that oft-derided "old" Club World seats were a much better option for couples.