Check out the Decware CSP3. It is an excellent pre amp. It has gain adjustment for the input and output tubes allowing something Decware calls gain-riding. It changes the character (tubiness) without having to have a lot of tubes. I had one and really enjoyed it. It allowed me to find the type of tube sound I prefer. I does respond well to tube upgrades. If I remember they come with lifetime warranty. There is a waitlist that is usually a few months. I would order the base model, it has a 30 day return, if you really like it sell it and get a tricked out one.
Used CSP3's re in high demand and reselling will be easy. Check out the Decware Forum Classified site https://www.decware.com/cgi-bin/yabb22/YaBB.pl?board=classifieds
Decware has a cult following.