I recently purchased the vertex modulus bass, plugged it in and thought wow what "even-ness". The neck, feel, and sound remind me of my Pedulla but faster neck with more thickness. So to my point. I have a Quantum 4 with one EMG active pickup. I like that bass, but this one with passive electronic seems to outperform in most instances. So, my questions are as follows: please answer what you can. I need opinions... 1. Should I stick with the Bartolini soapbar? Would it even be worth going to a LanePoor? (I never tried a Lane Poor, but heard these are getting more popular) 2. Or should I upgrade to active bartolini? Is it worth it you think? 3. Or should I upgrade to active Aguilar bass preamp (I never really tried aguilar stuff, but I heard they have a nice growl) 4. Better yet should I just get an Outboard Aguilar to have options?