I'm really confused! I've heard two very different things about both mics for use on toms. I've read that the E604 has a very natural sound on toms. Then I've read that they have a very nice scooped-mid rock sound. I've read the exact same thing about the Audix D2's. This makes absolutely no sense...how can a mic that picks up a flat natural sound give a scooped mid-range response at the same time? That is contradictory. In a nutshell, I can't see spending the money on MD421's at this point. I'm also sick of using SM57's on toms because those damn "spinny" plastic rings rattle like hell, and I'm just not a fan of the sounds I've been getting. So...that said....are the E604 and Audix D2 comparable in sound? Is one better for rock/metal toms? I basically want the slappy yet punchy tom sound.