Tone starts with the fingers and works its way through everything up to and incuding the room in which you play. You can't really change your fingers, and every room is different. Here's the gear I use to try to control the variables inbetween.
Marleaux Consat Custom 6
Marleaux Consat Custom 6 Fretless Edition
ADA MB-1 MIDI Programmable Preamp - Check out the review that I put on Harmony Central about the unit.