Panasonic TV with DisplayPort @ 4k 60Hz?

Hi all,

I know there are a lot of similar questions around regarding 4k 60Hz screens with various Macs at the moment but...

Does anyone have any experience with, or any strong opinions about using the Panasonic Viera range of 4K TVs with DisplayPort running at 4K 60Hz on either a 2013 Mac Pro or 2014 Mac Mini (i.e. current models as of June 2015). Obviously via DisplayPort only! I'm looking specifically at either the Panasonic

Viera TX-58AX802B, or TX-55AX902B.

Thanks in advance!

Colin