You have gear that is above your RP-1, so that’s an issue. I am curious as I have an RP-1, have you changed the two 12AU7’s ? A nice pair of Tekefunkens will make a huge improvement. I also recently acquired a mint condition Hera. The Russian Super Tube’s are pretty much unobtainable, but EH gold pin and Sovtek are easy to source. Look up @mulveling on this site, he’s very knowledgeable on Rogue and gives very sound advise. Rogue’s support is first rate as I just had my amps upgraded to Dark status during a repair. My friend has better gear and more money than I and he progressed from Rogue, to Bryston , and now McIntosh. If I had the Cubed like you, I’d consider the Hera , Cary , and definitely the Zesto. Upscale has the Leto 1.5 on sale for $6K , give them a ring. Happy Hunting, Mike B.