Maybe being zone/region free for DVD and BD is a requirement?
I don't know about the Panasonic players but, for the OPPO BDP-10x/UDP-20x there is another interesting value if you are willing to jailbreak the firmware (it's actually quite easy, even fully automated for US versions).
It gives you the following:
- DVD/BD/UHD/SACD ISOs <= These work for me
- DVD-Audio ISO <= These work for me
- BDMW (2D/3D) files
- ACVHD files
- DVD region free <= confirmed, + mine was region-free at purchase
- DB region switching <= confirmed, it erased my initial region-free version but setting the menu language changes the region
This gives 2 main benefits:
1/ You will be using the optical block a lot less, potentially extending the player's life.
2/ If you have a NAS, you don't even need to get up and get the disc to play your movies.
Julien