Aesthetix Romulus Signature Upgrade Worth the $3,000 ?

Hi all,

I just purchased a "base" Aesthetix Romulus and am very happy with it. Has anyone had their unit upgraded to Signature or heard the base unit and Signature unit side by side? I am wondering what the sonic differences were and if you think it is a worthwhile upgrade. The vast majority of my units use is spinning cd's on a high resolution system. I would be particularly interested in the difference in dynamics and bass extension with the upgrade.

Thanks for looking!!