Aesthetix Romulus Signature Upgrade Worth the $3,000 ?

Generally speaking I'm much more partial to tubes than transistors,  however there are exceptions sometimes. I was initially going to buy the tubed Yamamoto. The Distributor  ((also a tube guy) heard  both versions and surprisingly the overall sound was very similar. The subsequent 6 Moons review comparing them confirmed that close overlap  (though not identical ) both are organic, dynamic and exceptionally musically engaging. 

No surprise really when you consider that the designer is noted for his SET amplifiers. He built the DAC on same prinçiples, avoid negative feedback and use simple circuit philosophy which  he believes leads to  a natural sound character.  Knowing this mindset ànd the Distributor and reviewer ilistening impressions  plus the SS version is 500.00 less than the tube DAC. I felt comfortable with choosing the SS DAC. It is an  excellent match with my DHT  tubed components,  naturalness is its innate character. 
Charles, 

OP-

did you get the upgrade?

The PWT is essentially unchanged, any vintage is fine. 
Charles, 

Okay, so I want to thank everyone for jumping in on this thread, it has been fun and beneficial! But, we take a turn. I have sold my Romulus and am getting a Pandora Signature in its' place. I will initially use my Oppo 105 bluray player and a Kubala Expression rca digital cable to drive it but that is short term. I've seen here that the PS Audio PWT is a major improvement over the captive Romulus drive, what other transports have been used with success? Also digital cables? Everyone thanks in advance and have a great weekend!