Your TT is still the weak link. I'd go for really good power filtration for the Classé, if warranted and a cryo'ed, tuned power cord. My choice of TT is well known, but one would need at least 5K to defeat my creature on steroids...
How do you know it's time for external phono stage
I have a Classe CAP-100 with the optional phono board. I upgraded my Rega Planar 3 to a P25 a couple of years ago. I upgraded my Super Elys to a DV20XH a couple of months ago. I listen to every type of music. My speakers are Spica TC-60's. Should I expect great improvements from an external phono stage? If so, how much should I expect to spend? Any recommendations? Thanks!