Integrated for GMA Europa, Rega Apollo

Can anyone suggest a great integrated (remote a must) that will do justice to a Rega Apollo and my GMA Europas? I'm currently using a NAD C320BEE which I've preferred to several other integrateds I've owned. Is there anything used under $600 that would be worth my while?
audio refinement complete should be at the top of your list in that price range and with those speakers.