Get the base version (If your PC can run it) and you can always upgrade later. I did. I felt I played the game so much I really wanted the extra gear space so the price was worth it.
Defo. Probably the first game I've enjoyed so much that I actually went and dished out some cash for. EoD stash size is everything honestly.
Gotta say I'm liking Interchange, but I'm curious as to how it'll run once they include Scavs. Should be an interesting change of pace for the map. I also wanna say I kinda like the new reloading method, just wish you didn't have to be in the menu to do it.