I'm going to re-ignite this thread as it was a good one.
I've had a couple more preamps since, even demo'd a Monique.
Mindprint EN-Voice Mic preamp - This is a bit of a rare bird to find anywhere, but there was a follow-up to it that is still available. This was pretty deadly German made mic preamp that works great for bass.
It's got massive gain in comparison to many dedicated bass preamps. However, it was fairly scooped sounding without anything else running on it, where the signal shouldn't have been affected at all.
Aguilar DB680 - This is a fantastic sounding preamp. Probably one of the best pre's for bass I've ever played. Ironically, I just sold it today, but it's mainly because I wanted someone else to check it out and continue my tone quest.
I still have a strong interest in trying a Millennia STT-1 and/or TD-1 and can't afford to keep a collection as I go, so one has to go.
Yamaha PB-1 - Well, I have this preamp given to me. It just sat in one of racks for a while. Over the past couple weeks, I've given it a good run and man is it awesome!
It definitely has the Fender tone stack going on, so you have to turn up the eq so you get output, but the two biggest thing I found with this preamp is just how clean it is and how its incredibly noise free.
I don't think I'll ever let this one go, but who would when it was free!
Monique Dove Cage - I didn't get to own this one, but was able to demo it for a couple hours at a friends house. This is a pretty killer preamp that does live up to the hype on this website.
Sounds really good, I just found it didn't have the output I liked, even with the one knob pulled out to give a boost. I might try this one at home if I get the opportunity, but I'm thinking it's not really my thing. I'm thinking pure solid state is really my thing. So, I'm maybe a Glockenklang Bass Art might be a good dedicated bass preamp of choice.