B lounge is the newest - but usually busy...not so busy not to visit, just busier than others at times.
F has a SkyDeck and upstairs seating and showers.
F also has The Club for PP access
E generally has slightly better food selection (90% same as others), but also has a showers and an Asanda Spa.
A has two lounges, both upstairs, one higher than the other I think (escalator in corner of center section, then elevator stairs...or the one by A17)
D has two lounges also, one very small, other downstairs (27) that is usually quiet.
C has an upstairs lounge that spans both sides of the terminal.
Another option with that long of a layover is the Porsche experience - right next door to the airport.