yes, upgrading the DNA-1 is a bad idea because of the resell value. I made this very mistake myself, with my DNA 0.5!
I do like the DNA 0.5 revB. It has great timing and musicality, very good imaging, and great timbre. The only small issue is that it does not have the absolutely grain-free sound of TOP amplifier. However, consider that I do not use any AC filtration, which might make the mccormack grain-free. And to put things in perspective, the sound of my old Classe' Seventy was much harsher than that of the DNA.
Oh, given that the Chario are 85 dBs sensitive I guess the DNA0.5/125 should work fine.
About the Chario: what is it that you like about them? If you like the sound of 2-ways mini-monitors, you'll be delighted with a pair of Tannoy coaxial speakers... With those small drivers something tells me that the Chario distort a lot, albeit you won't hear that as distortion (been there, done that!). Just to make sure, I checked the Stereophile review, and, as I suspected, they don't measure the distortion...
This is meant as constructive "criticism", in no way I want to question your choice of the Chario.