You list some nice choices.
Parasound, NAD, and Rotel are also pretty solid options in that price range.
Other options include Marsh, and old Onkyo or Yamaha, Conrad Johnson's Sonographe series, Outlaw Audio, Monarchy, or maybe an old Forte.
What speakers are you mating it with, and what are your sonic preferences? That might help to narrow down the list a little. Nonetheless, a $500 budget is perfectly adequate to get something decent on the used market.
Michael
Parasound, NAD, and Rotel are also pretty solid options in that price range.
Other options include Marsh, and old Onkyo or Yamaha, Conrad Johnson's Sonographe series, Outlaw Audio, Monarchy, or maybe an old Forte.
What speakers are you mating it with, and what are your sonic preferences? That might help to narrow down the list a little. Nonetheless, a $500 budget is perfectly adequate to get something decent on the used market.
Michael