Blueball, Are you referrring to the HiFi News July review of the RA Opus 21 system? If so, they loved it. They admit it's not for everyone because of it's single system configuration and both components show their best when used together, but they thought the amp was a "jewel" and is "one of the world's finest" for its price and in combination with the Opus 21 CDP. The CD player received a "strong recommendation in its own right." But I'm not just quoting others here; I own this system and I thoroughly enjoy it! The Opus 21 is a highly musical CDP IMO, very involving indeed. I've owned it for nearly two years, the s30 amp for about 4 months. You can also read an in-depth review of the Opus 21 on 6moons.com. But having said all that, from what I understand, the ML will have a more detailed, authoritative sound.
Good luck with your decision, You probably won't go wrong either way.
Good luck with your decision, You probably won't go wrong either way.