McCormack DNA-750 good?

I don't know whether they are on par with Mac or Pass labs I have not heard those amps, but I do know that pass labs is in a league of its own. If money is no object then go for the best.

Money IS the object. I would buy used. Which is why I'm looking at the McCormack monos. Still considering them. Are they worth a purchase in everyone's eyes? Or wait? Buy something better.........is there better?

I'll probably purchase t hem, they are in flawless condition. Only concern, is they are from 2009, and getting old, no warranty left.

Since you asked, I suggest you not rely on "everyone's eyes" when making your amplifier choice but rather rely on your ears. I suggest you listen closely to the 750s before you purchase a pair. I have no doubt they are powerful but they also do not have the universal reputation for musicality of the older McCormack amplifiers (e.g., DNA-0.5, 1, 2, 125 and 225 and 500). I would listen to any of those you can in order to gain perspective and to form an opinion.

Buy them! 2009 is not old, you can always resell if you don't really like. Is it a hassle, yes, but most of the time listening first is not a realistic option. Go for it.

These were purchased pretty much sight unseen a couple weeks back, I wanted to get thoughts from people on them.
They arrived about 5 days ago, all I can say is I will never let these leave my house, maybe upgraded, these are my reference amps, and I highly doubt there is better, even if I do spend much more on pass labs class a stuff, the point of dismissing return would apply. These McCormack/Conrad Johnson amps are just amazing. From low volume listening, to the ability and aggression of a charging rhino shi*ting glass, these amps are absolutely amazing.

Detail, relaxed, etc etc, I can go on, but you get the picture. I am done for a long time with looking for the perfect amp. !!! Sigh