I did spend some time with the Adcom while I'm waiting for the claim to be processed. I wasn't afraid to turn it on, unlike the Vincent amp which had serious chassis damage and the power button was stuck in the on position. I didn't even dare plug it to power.
Between the Adcom and Parasound, the Parasound would have won anyway. Both deliver the goods, but a couple build details on the Adcom turned me off to it. The hole in the binding posts for raw wire are WAY too small, and I couldn't get me 12AWG Belden through it. I'm honestly not sure 14AWG would have fit that hole:
I bi-wire my speakers (for no other reason than I have spare wire) but In order to use the Adcom I had to cram both wires into a single banana plug. Didn't have this problem with the Parasound:
Pictures might not show it too well but it's a much more accomodating size. Ugh I gotta go back there and separate my speaker wires. eventually...
Another turnoff was that the Adcom doesn't have a relay tied to the power switch. When you turn it off, the capacitors discharge over the next 15 or 20 seconds, and the speakers aren't isolated. Well last night I had forgotten this, and shut down and unplugged the amp to switch cables, and got a very unpleasant pop out of a speaker when I pulled one of the RCA cables.
The RMA for the Vincent was processed last night so I shipped it back today. I wish I had gotten a chance to play with it some.
I've spent a good few hours fighting a nasty buzz emanating from my sound card. It was a grounding issue for sure, but the noise was bad enough that I could hear it from my sitting position ~5 feet away from the speakers. The Adcom only has a 2-prong cord and made no noise, but the 3-prong Parasound did. With the computer off, both amps were whisper quiet, even with my ear to the tweeters. Turn on the PC and the Adcom stayed quiet but the Parasound was picking up all kinds of noise.
After much googling and troubleshooting with no results, I made a cheater cord by pulling the ground pin out of a power cord. This made the noise go away but I'm not a fan of gambling with electricity. You know what fixed it? I swapped in a pair of Amazon Basics RCA cables! The buzz is now only faint when my ear is at the tweeter and inaudible any further away. I guess the older cables didn't have the best shielding. I never had this issue with my monoblocks though- I wonder if them having complete power and signal isolation from each other prevented this.