either way. Like 2 of the posts above, I think the Rg Black dial contrast is a tad strong. If you can, go to the AD to have a look at the Mayu RG/Black example. On the net, the RG/Black looks very nice and I was considering it but in the metal, for me, it was less nice.
As for the PT/Grey example, also take a look at the PT/Grey Mayu in the metal. Again, for me, how it appeared on the net was nicer than in the metal and my favortie metal is PT.
I have ended up ordering the RG/Silver dial version which for me, was so much nicer in the metal than on the net.
Again, the above is subject to my wierd taste so my advice is to go take a look in the metal but in any of the iterations the Perpetual 1 comes in, I don;t think you can go wrong becuase as a watch itself, I think it is great!