Killer used integrated for <$500?

It would be helpful to know what speakers you will be using in order to make a good recommendation. In my bedroom system I use a Rega Io and Tannoy Mercury speakers. It's a great sounding amplifier that punches way above it's $599 MSRP. However, it requires careful speaker matching as it only puts out 30wpc. Good Luck!

I have heard the Rega Io with the Proac D2's and Tablette's. They sound great together. The best I have heard with the Io was the Vandersteen Wood VLR CT's. Not exactly what you would expect pairing a $3,000 speaker with a $599 amp but they sound great together. The standard VLR @$1650 is a good match as well.

If you are anywhere near Verona NJ you can go listen to the Rega Io with the Vandersteen's, Proac's and B&W speakers at the Audio Connection. JohnnyR will take good care of you. Good Luck!