When is your flight there are still a couple of 3 class 777's with NCW rather than NGCW although this would have all changed by April.

I assume by the seat numbers you are looking at it is before then. If it is NCW then 2EF and 11EF are great for couples but if you end up with an aircraft with NGCW then 2EF are not so great you want to be looking for 5EF and 11EF

I have just said that basically if you go for 11EF but when you OLCI and if you can get 5EF then do it