I'm flying BA Club World for the first time with my wife. Our daytime flight on a 747-400 (70 bus. seats) has wide open seat availability - basically, all of the lower level as well as 64A/B and J/K on the upper deck. In terms of traveling with a companion, which seats do you recommend? If I chose 64A/B would we be able to easily chat or would we be better off taking an E/F on the lower level?