Paul you have an outstanding base to start with & moving up the later is going to cost you large, so you’ve hit the nail on the head there. Compound that with the audio disease, meaning what ever you do will eventually lead down the road of discontentment.
Best path IMHO from both a sonic and economic prospective would be to up grade the caps in your Rogue with either Mondorf’s Supreme Silver/Oil or V-caps (do your research), along with some new high quality tubes, . https://www.vhaudio.com/21capacitorshootout.pdf
Another possibly is a Vishay volume control. But that’s getting expensive
The other suggestion would be to purchase only high quality recordings.
As for cartridges .... now you’re racking up the bills. There’s a host of used MM that might tickle your fancy, but as for their condition it’s a bit of a shot in the dark. You already have a far better than average cartridge in the Hana SL, so your next move might be a Soundsmith Aida, or Voice, but now you’re doubling and tripling the price of your Hana. Is it worth it ????? Now we’re back to the law a diminishing returns.
Then of course there’s the listening room. If I may suggest, address that if you haven’t already.