Are all CD players with digital out gonna produce the same quality of sound?

I know all things are made different, but since the output is digital and my AVR is doing the decoding, I'm wondering would there be a difference?

I'm currently using a RCA/MP3 cd changer. It cost about $80. I don't know if something in the $300 price range is gonna give me better sound. I could always use my 2910 but I want at least a 5 disc changer.

Thanks