Well I just bought a Pioneer Elite DV 09 used for 300 dollars(ad here in a local paper)I see advertised for 500 to 700, and I do think it is a great unit. There is a Panasonic 1000 being advertised on the site for 6 something I think was a 3k machine retail(whatever that word means anymore) and is massive at 30 pds+ that is supposed to be great. I have owned the NAD 550 and it was pretty good, can be had in the 350 range used.
Good luck
Good luck