I'd choose an obscenely expensive and rare Chanel.
Don't ask me which one cause I don't know. But if I could pick any bag in the world, it's where I'd start. Even over a Hermes I think.
I like that Dior bag a lot! But if I could only have one, I'd probably pick a Chanel or a Hermes... but based on my current inventory, I think I'd have to save the Balenciaga city.