McCormack DNA-1 Gold or DNA-225

I have a DNA-1 Deluxe with the SMc Audio Revision A+.  At the time, that was the highest level of revision available.  I have and continue to revel in the sound of my system with that amp.  I don't know that much about the 225, but have no doubt that it is a fine piece of gear.  Don't see how you lose with either amplifier.  Flip a coin?

A while back I spoke with Steve about this, and he said the DNA125/225 were roughly on par with what was the Rev B upgrade mods in older models. If that’s the case then a DNA1 Gold is likely to be significantly better than a stock 225. By far your best value IMO would be to wait for a DNA1 to come up used with Rev A or Gold upgrades already done since you’re basically getting big discounts on both the amp and the mods. That said, there’s a DNA1 with silver upgrades available here now. If you can get a good deal on that it will obviously cost much less to upgrade to gold level. I’d be sorely tempted if I’m you since modded DNA1s don’t show up all that often.  Hope this helps and best of luck.

Get a non functioning unit and have it sent to SMc Audio. They will essentially remove everything and give you a new amp. 
There is one DNA-1on Ebay with a 'Make Offer'. Have the seller ship it directly to SMc. Pat or Steve will guide you through the upgrade process.
Bob

I bought a stock 225 a few years ago and loved it. When I saw a Platinum come up for sale, I snapped that one up. It was a big upgrade from the stock amp. I sent it in close to two years ago to be upgraded again. It's now labeled an Ultra 15. I had planned on starting another system with my stock 225 but may consider selling it? Never heard a DNA-1.

Their upgrade program is different now than from several years ago. Steve makes his own internal wire, uses different solder in various places based on sound quality, etc....Very meticulous. Great to work with!