I've been listening to the D/AC 1000. A very satisfying sound. Lots of mids, plenty of bass. Some congestion, too. And a relatively close soundstage. Great bang for the buck. The Dodson is better, IMO, but I see why people love the Parasound DACs.
I like the fit 'n' finish of the mk2 very much. A lot more comfortable, IMO.
I did not find the 800 to be as comfortable as I had hoped. The earpads are great, but I don't like the headband.