Sorry, can't comment on the DNA-125 but I owned both the DNA-1 and DNA 0.5 about ten years ago and for some dumb reason sold them. I few years ago I got lucky and picked up a DNA-1 on eBay. I'll not sell this one.
I have used the DNA-1 on Raidhos and it is very good, but possibly a better match for a slightly cooler speaker. The sound was good but I use a W4S STI-1000 instead as the W4S provides better clarity and detail and has a great hold on the bass. I really like the DNA-1.0 on my Martin Logan SL3 electrostats.
I cannot imagine you'd be disappointed with the amp. Good luck.