Hey I'm wondering what kind of on-board preamp fit best for a metal kind of bass. I'm the kind of guy who likes alot of growl and strings smackin against the frets from a bass so I want to upgrade my ESP F-205. I first thought of the Spector TonePump since I love the sound of my spector euro, but then i thought that maybe an 18 volts preamp would be best. So I thought the EMG BQS system would be cool, but now I'm stuck. I also heard Aguilar and Bartiloni are good but I'd rather hear from the people that know more about the sound of these preamps. I've already decided on what pick ups I want (EMG 40J & EMG 40DC) but I'm open to any other ideas. I mainly want to know more about preamps since I think I know enough about the pick ups I'm choosing. Also do you think an 18 volt is better than a 9 volt to get my kind of sound?