Preamp match for Mccormack DNA-125

BAT 3i at the bottom of your price, 5i at the top end.

If you're not dead set on the remote, I'd get a Supratek Syrah... see the thread about best preamps under $10k.

I have a similar system (Supratek--SMC DNA 0.5 Platinum--Ref. III's).

I owned a DNA-125 paired with a Sonic Frontiers Line 1 with great results. The McCormack with a very clear-sounding amp, but a bit lean as I recall, the Line 1 gave it a nice roundness to the sound. The line 1 also offers a ton of features : polarity reversal, programmable input, and the cool round remote, and much more. Add to this SF legendary build quality and parts selection and you might have a winner here. Good luck.