Rsjm80 ... if you get a chance to ask ARC to "freshen up" your CDP, please let us know what if anything ARC recommends. I suspect that if anything, they might just replace some old electrolytic caps.
I think your CDP is solid state, so tubes should not be an issue. Not much else to go bad.
The only other part that could get expensive is the Phillips transport (about $500), but frankly, I've never read or heard that one has gone bad. It's a pretty robust drive.