2 for 1 or the PS Audio upgrade route?

If you're looking to upgrade from your PS Audio DMP and Directstream MK1 to a single box solution, there are a few options to consider. The Accuphase DP-720 or 750 and the Marantz SA-10 are both solid choices with excellent sound quality.

The Accuphase units are known for their high build quality and reliability, although they may be more expensive in the USA. The Marantz SA-10 is also a well-regarded unit with excellent sound quality and a more affordable price point.

Ultimately, the decision between upgrading to a single box solution or sticking with the PS Audio gear and upgrading over time will depend on your personal preferences and budget. If you're happy with the sound of your PS Audio gear and appreciate the ease of upgrading over time, then sticking with the PS Audio upgrade path may be the better option. However, if you're looking for a single box solution with superior sound quality, then the Accuphase or Marantz units could be the way to go.

I would consider having your DSD MkI upgraded by JKRichards.  He has designed some nickel transformers along with upgrading to VOCM caps.  From the feedback from those who have upgraded, it appears to be a no-brainer. 

To provide an accurate response, I would need more context regarding what you are referring to with "2 for 1" and the "PS Audio upgrade route." Please provide additional information or clarify your question so that I can assist you better.

KMFusa

Thanks everyone for the responses. This situation took an odd turn as a Sonic Frontiers unit with PCX upgrades performed in 2103 and 2020 became available. So, without hesitation, I purchased the updated SFCD-1. It is a super good unit. The only downside to this unit is recordings that are awful, stay awful. It does not sugar coat lackluster recordings to make them listenable. 
 

Along the way another CD player became available. An American Audio Labs P-11. This is a modified Magnavox CDB-560. After some TLC, the unit is up and running. This P-11 is also an incredible sounding unit. 

So, for now, it looks like I’m standing pat with the units at my disposal. They may not be the best of the best or the latest and the greatest yet, to me, the law of diminishing returns has unequivocally kicked in. Perhaps in the future a mega dollar unit will be pursued. However, for now, the lower dollar units are here to stay.