After careful consideration, I'm probably going for the Australian 4K release. I'm not impressed with the US packaging, and sad to say, the UK packaging is no better.
Be aware shipping out of Australia is apparently even more of a mess than it usually is. Buyers on the Blu-ray.com board report 8-12 weeks with many packages bought in summer time only now just showing up. Personally I would avoid any Aussie imports unless you are buying them from Deepdiscount or Amazon, or an Ebay seller based in the USA.
This set is really nice though. Universal remastered the Blu-Rays too so even if you don't have 4K, these transfers are an improvement on the older Blu-Ray discs.