Just my opinion but I would like to see a broader range of individual kit pieces over at XLN. Especially, latin percussion.
Also, be careful about the snares and kicks when you make your choice. If you already have AD2 and some kits you could be choosing the same kick or snare kit piece you already have in a kit you already have. I almost bought the same piccolo snare that I had from AD1. I thought about that and switched to the DW piccolo instead.