Upper class seat selection

Hello there,
I have tried searching forums for couples travelling together but with little luck - only 1 post re LGW 747.
We are taking our first UC flight together - into LAX and out of SFO and would like your opinions regarding best seats?
Pretty sure upstairs for the return flight is best option as overnight flight - having travelled upstairs before am sure this will be quietest for a sleep. Just not sure as to whether we should sit opposite each other (ie 6a and 6k) or better to sit next to each other (ie 6a and 7a). Having never flown UC before not sure of proximity of suites.
Any help with this and also the airbus into LAX would be much appreciated - we are intent on getting the best experience possible!
I have tried searching forums for couples travelling together but with little luck - only 1 post re LGW 747.
We are taking our first UC flight together - into LAX and out of SFO and would like your opinions regarding best seats?
Pretty sure upstairs for the return flight is best option as overnight flight - having travelled upstairs before am sure this will be quietest for a sleep. Just not sure as to whether we should sit opposite each other (ie 6a and 6k) or better to sit next to each other (ie 6a and 7a). Having never flown UC before not sure of proximity of suites.
Any help with this and also the airbus into LAX would be much appreciated - we are intent on getting the best experience possible!