As a consumer I like to see products where the optional accessories are things where it does not add to its performance, I like to know that the product I am buying is as good as it could possibly be. If companies feel that the PSU will improve the sound to the next level than include in the package as an standard unit. As a consumer I think it is important to voice your concerns, if you tolerate too many things change will likely not come about.
I for one at that price tag would have a different standard for what I have with some thing under 1K.
If you want Meridian "as good as it could possibly be," I think it'll cost you around $22,000 for the Meridian 808v5. As for me, I'm glad they have a more affordable option in the Prime, and that I might be able to further improve its performance, if I want to, by spending another $1250 for the power supply.
For some, the Prime might be out of reach if the only way it could be bought was with the fancier power supply. I like that it's a choice.
That said, I'll be giving that Prime power supply upgrade a whirl soon. Chris Connaker at ComputerAudiophile seemed to think the upgraded power supply was worth it. I'll let you know if I agree, before long.
I happen to have the Naim DAC-V1 here, to evaluate for possible inclusion in the holiday update to the buying guide. It might be a little while before I can get to a direct comparison, but I'll see what I can do (after the guide update is done).