Ok, i'm making a project bass, to the shape of a Thunderbird (Changed a bit though). It has mahogany wings and i'm using either just walnut or walnut and mahohany in the neck and i'm using an ebony fingerboard. I'm usually a user of D'addario Pro Steels or Nickels and will sometimes use something a little rounder like elixers. For amplification I'l be using a Sunn 300T filled with Svetlana 6550C's and cabinet wise I will be using something along the lines of Schroeder, Bergantino or Eden. I'm not an effects guy really, so 99% of the time it's straight from the bass to the amp. So, the tone i'm looking to get from the Thunderbird is agressive, gritty and growly. The sort of growl i'm talking about is like Timmy C from Evil Empire/Rage days. I also like the grit Chancellor from tool got on Aenima as well, but I realise that he's using a wal . I've had my eyes on some Dimarzio Model/Ultra J's as most people seem to say they're very mid oriented with a nice attack and growl and they're also pretty cheap. I've read a few threads, but they don't answer my question exactly, and i'd like some definite answers as i'm kind of been pushed to get this bass done in time. So would the Dimarzio's do the trick, or should I look at something else? Should I be looking at another setup like a P/J? I don't want to go H/H though, mainly because of the cost. Thanks.