Thoughts from Joule preamp owners?

I think based on what you are looking for, the Joule will not disappoint. Good luck! Hope you like it.

I would also take a look at the Cary SLP-05

Yep, I thought about the Cary, as they are quite cheap used now, but I read they lack some definition, plus you have an extra power supply box. And they have 8 6NS7 tubes, and I have dealt with 6NS7 rolling and it can get expensive.
Thanks for the suggestion Brf!

Both good, but if you are already into the Joule camp, stay there.

I am not familar with LA-100 but I auditioned the rest of their preamp line. LA-150 Mk1 (original) is not terribly musical on my taste.
LA-150Mk2 is fantastic - seduce you into the listening and you can't stop. Excellent bass. For my taste a bit more midrange lush then I liek.
LA-150SE is just right, texture right, dynamic range, minute details etc
LA-300ME, I own is something exptraordinary and I thought for a few years that it is impossible to make a better one
LA-450ME - when I auditioned it I understoon that it is possible to make better preamp then LA-300, and it is "450". It sound indetical to LA-300 but....better.

Good Luck!