I posted a semi-detailed review about JCInventory a day or so ago if you check the last page of the thread here for it for more info. Might help you decide.
All I’ll say is that if you want to expand the system beyond the basics, meaning more than just have the items stored in the grid then you will have to be comfortable enough to learn any of them out there and take the time to learn them so you can integrate them into your game properly. I use JC’s and i know it pretty well now. Theres basic “backpack” and container support in it already. I was able to figure out how to set rules up, so when an item is picked up, where it gets dropped to(backpack a or b or c or whatever) and also what items CAN be put in backpacks or containers etc… so the rough-in is already there for what you want, providing youre comfortable with blueprints.
I haven’t tried any of the others. Whichever you go for, do leave feedback on the thread for it. The creators need the word of mouth and it helps the shoppers make decisions too!