My current bass rig is a yamaha GC2020 compressor run through a yamaha p2201 poweramp into an eden d210XLT. That's right, no preamp, I just use the compressor as a DI. This doesn't actually sound half bad, but the only tone shaping controls I have are the EQ dials on my active bass. I'm looking for a tube preamp to add some warmth and versatility to my rig, and due to price constraints I'll have to buy used. So far it looks like a choice between the Eden Navigator, Aguilar DB 659, Demeter VTBP (probably an older 1-space version, hopefully with a DI) and Alembic F1-X. The demeter seems to be the cheapest, but I've heard that its EQ isn't very flexible and it doesn't seem to have many noteworthy features aside from good overall sound. The Eden has all the features I like (compressor, crossover, volume boost control on a footswitch,) but it's expensive and I've heard complaints about the tone. What do you think would be the best choice?