Which do you prefer parasound Halo a21 or McCormack dna1

sorry,but a 2nd footnote. After looking more closely at the amp on ebay,it looks like the same one that was being sold here on Agon
by TMR ,The Music Room,within the last month. I'm pretty sure because I was considering
it myself. Anyway,if you look into it ,you might want to ask about that
because that would be a very quick turn around. Sorry,don't mean to 
butt in.

a footnote......prices can vary on the McCormacks...I paid about 
$700 a couple years ago from TMR here on Agon. I'd say 7-8 hundred is a good ballpark price. If you can get a deluxe for that price,even better.

I am very happy with my stock McCormack DNA 1. I saw the one for
$1,749 on ebay. If you're intersted,call Steve McCormack and run it
by him. I've spoken with him a couple times and he is friendly and 
enormously helpful.  No input on Parasound ,sorry.

There’s a DNA 1 with Steve’s Rev A Gold+ level revisions on EBay for $1749. I haven’t heard the A21, but the DNA amps with these revisions set a high bar and are an incredible value used. Best of luck.