I've put on the BMW panniers with the side opening and just flat don't like them after having top loaders on my old GS. As far as I know BMW does not make a top loader for the new GS so I'll have to look elsewhere. But I'm so dissatisfied with the side opening I will replace them.
I've also added the BMW crash bar, PIAA lights and BMW tank bag. I'm satisfied with all of these especially the lights. They are mounted on the crash bar to get them as far away from the turn signals as I can. I almost always buy a custom seat but the stock seat seams to be working fine. I may go for a Corbin anyway to get the back rest.
Nothing else planed. This is the finest motorcycle I've ever owned or ridden and will be with me as long as I ride.