Best DVD Player for Under $500


I am looking to upgrade my current CD/DVD player. I have up to $500 to spend and am amenable to buying used equipment. Any recommendations? (I do not need SACD or DVD-A capabilities.)

Thank you.
adidio
I know where you can buy a Denon DVD2900 new for 550.00, it has received nuberous positive reveiws and acclaim from the AV mags. And does SACD/DVD-A etc.
e-mail me if your interested. It as dealer freind of mine.