I'm currently cycling through the Ergo2, Ranger, Grip L (in the process of selling) and the A series I got from you. There is one glaring flaw with the (or at least my) Ergo 2. The aluminum frame isn't padded on the bottom and constantly hits my lower back as I walk....it get's old really quick. I'm still trying to find a solution to that problem. Without that problem I've have to give the nod to the Ergo2 with the main exception being non-disc storage.
But when considering that problem with the Ergo2, I reach for the Grip or Ranger(best bang for buck I've used so far) in the day's that I've played multiple rounds.
Just got the rainfly today for the A series, thanks again. Hope you get better soon so you can put some miles on that Mojo.