I've had a few preamps in the past that simply did not maximize the potential of the power amps through which they were running, leaving me disappointed, to say the least. I have a couple of different rack setups right now, one of which being a Rocktron bassMAXE into a Trace Elliot 500 watt power amp and it is loud as HELL!!!!!! That Rocktron REALLY pushes the power amp unlike any I've owned or tried. So, basically, I'm wary of trying a different preamp (which I might like to do for a different tone, trough this Rocktron's tone is quite nice) because I fear finding one that won't push my power amp like this Rocktron. Can anyone suggest other models/makes that really push the power amp, based upon actual experience? Oh, and though I would love to have a Demeter, I can't spend that kind of bread.