Onyko DX-C380 Need to Upgrade?

Currently using this 6 disk changer, I am thinking of upgrading this source. Will I notice a dramatic improvement if this is done in the $300 price range...The NAD C541i is an option.. any others? Is this the weakest link? Thanks...The rest of my set up is
Monitor Audio S8's
Adcom GFA 535 II
Adcom GFP 565
Kimber Silver streak pre>amp
Kimber PBJ CD>pre