The mini cabin is a tad quieter the kitchen is towards the back so six should be pretty restful, you will be some of the first people off as they block the second section of club world to allow first off and well first can’t deplane until the mini cabin does, some people complain that the mini cabin gets overlooked on service upon occasion but I have never had the issue, five is my favorite row as there is no one in front of you. Some couples prefer to take two window seats one in front of the other on a flight that long, all depends on you, you can talk in the middle seats but it is a little awkward, the suites do have doors so to speak which add a little additional privacy. Others are telling you not to pay for the seat assignments but A) you might have status and not be paying and B) if you care about something paying to get it is always a good strategy