There appears to be some confusion with McCormack amps. I'm not exactly a McCormack amp expert but while thoroughly enjoying my own McCormack amplifier, I've done some research and had a few converstions with people in the know.
Here's how I see the McCormack line-up.
Several years ago Stereophile rated the unmodified DNA 0.5 (msrp around $2k) a competitive second to the Krell Audio Standard amp which sold for about $33k. Therefore, a modified DNA 0.5 Rev should be pretty fabulous sonically.
From what I've read and heard (from others) the DNA-1 and DNA-2 standard and deluxe version amps are fine amps but should in no way be confused with the same models once smcaudio has modified those amps to a Rev A.
According to reviews and consumer remarks, the DNA-125 and 225 models also appear to be solid performers. Whether these are better or worse than the DNA-1 and DNA-2 standard and deluxe models I don't know. My hunch is the DNA-1 and DNA-2 would be superior but it's just a hunch. The DNA-1 and DNA-2 models are at least more powerful wpc-wise than the later 125 and 225 models.
The DNA-2 LAE (Limited Anniversary Edition) amplifier is, according to IAR's Peter Moncrief, far superior to other DNA amps as well as most every other amp period. Moncrief said of this amp "This power amp does everything a solid state amp is supposed to do, and does it better than any other solid state."
My understanding, talking with McCormack and owners of the DNA-2 Rev A amps, is that a modified DNA-2 to a Rev A or Rev Gold version would put it's sonics equal to or just slightly ahead of the DNA-2 LAE version.
-IMO