Aesthetix Romulus Signature Upgrade Worth the $3,000 ?

The answer is easy based on you saying you spin CDs. I owned this player and you only need the upgraded caps and resistors on the analog board to get the whole Signature upgrade when spinning CDs .  

I replaced the cheap yellow caps with Jupiter copper foil caps and Dynamicaps. I replaced the 4 resistors with the Vishay nude Z foils.
this is all that is upgraded on the analog board with the Signature upgrade. The total cost for parts was about $400.  

You our will have better resolution, darker background, better micro details, and a more airy top end. 

Also, to achieve even  better performance than the upgraded Signature footers buy the Star Sound Apprentice stand to go underneath the unit. It by itself is an amazing upgrade. It will give better focus, improved imaging, tighter bass and better separation of instruments. 

The he stand is $360 I think? Anyway both of my suggestions will give you even better sound than the Signature upgrade if you are only spinning CDs. 

I'll  2nd Grannyring's recommendations.  A good friend of mine had his Signature  upgraded to the Eclipse version and he uses the Star Sound Apprentice with very noticeable  improvement. Duelund CAST or Jupiter Copper  foil are exceptional  sounding  capacitors. Excellent  upgrade for far less than 3K dollars. 
Charles,