While you are correct about Harmon frequently, read always running the bill to the NTE limit, I must admit, they seem to do good work. A good friend of mine has the PAV/PDSD, and when after ten years or so the PAV develeoped a thermal problem. Harmon had him send both back (they wouldn't even accept just the PAV even though it was obviously the problem) They charged him ~$500 for the PAV and ~$800 (actuall total was $1350... can't rememeber which was more) BUT they replaced EVERY capacitor in both units, a new board in the PAV, new RCA connectors, new software, and new power supply.
He had asked me whether to buy a used one of return it, as it was a wash, he opted to return it, and now in hindsight, I think he made the right call. They also got all the work done in about a week, so a quick turnaround time to boot.
I have several Proceed pieces (HPA 2,3, PRE) and after his experience, am not worried about needing to send them back (should they ever go sour on me!)