I own a McCormack DNA-125, and it is in my humble opinion, a steal at it's asking price. I am of the opinion that it outperforms the bigger 225, with my system anyways. This hold true in many cases, just read the review of the musical fidelity amps in Stereophile recently, where the smaller AC3 amp outclassed it's bigger brother. Steve McCormcack is probably right about the superiority of the 225 when placed in a no-compromise system. However, with my 6K plus speakers and other still very expensive components, the DNA is without peers up to double it's asking price. To put it simply, this amp is like it's creator, a model of integrity. Sorry folks, any comparison with previous or older McCormack designs is futile. The new designs sound so much better it's not even funny. Hope this helps.