I was planning on buying a good used Mexican Jazz Bass and switching the pickups on it. I want a warm, but tight and focused sound. For an example, I like Tim Commerford's tone on the Rage Against the Machine song "Bullet in the Head". I am very much leaning on going with Bartolini pickups, cause i like their warmth and "frown" EQ tone curve. For an example of a sound I DON'T want, listen to the Duncan Quarter Pounder pickups. Not warm enough for me, and the P-bass one distorts the preamp!!! I welcome any suggestions or death threats , particularly dealing whether or not to go with the Barts. Thank you.