Is it best to isolate??

Just picked up a Audio Research cd7 and I whould like to get the most out of this player!Does isolating cd players really make a difference?I was thinking of the symposium rollerblocks with the titanium bearings under this player.I have heard that sometimes you can overdamping components and I don't want that to be the case.I'm using a Michael Green rack that is built like a tank already...