When I bought this bass the salesman was raving about how insanely awsome this bass was because of the Bartolini pickups in it, MK-1's. I thought that they sounded decent, but nothing like other Bartolini's I've heard in high end basses. I recently found out that Bartolini doesn't even make these pickups, but rather licenses other companies to make 'em. I don't really care about that, but I do want to get a better tone so it's time to upgrade. Here's what I've been looking at... Nordstrand Big Single's - I hear that these are loud and aggressive, strong on mids and highs and allright on bass. Norstrand Fat Stack's - I hear that these sound huge, but aren't as aggressive as the Big Singles. Bartolini MK5CBC - Don't really know much about these, but they're not to expensive so they're in the running. My EQ is usually set close to flat and I like when every note hit is heard in the mix. I play in a thrash metal band ala Exodus, Testament, ect... but do a lot of blues/classic rock jams. So what do you guys think? Any recomendations for pickups that I didn't already list?