I'm looking for a tube amp for a ZMF Aeolus. There are sooo many forum posts specifically about this but they are so contradictory, my head is going to explode.

I'm hoping if I give some context to what I'm looking for someone could help.

I have a TA-26s right now. I have been tube rolling through a whole lotta tubes, but I'm having trouble getting good bass without it getting super muddy/dark. I've tried combinations that people list specifically for the amp, but I've never spent more than $100 on a tube because I'm a total neophyte and not totally sure it's worth it. I'm running it after an RME ADI-2 and I prefer the TA-26 in the line for sure, but I'm wondering what I'm missing.

So, my question is: I'd love something that has lush mids without messing with the timbre of the ZMF, and just overall a more resolving bass and sub-bass. Do I:

1. Dive into expensive recommended tubes people on forums love (up to $500-$800) for the TA-26s
2. Get the Feliks Audi Echo MK2
3. Get the Cayin HA-3A

4. Get the Woo Audio WA6se

   Or something else?