I went for the brass, but not from any strong view point—just aware of how "musical" brass resonance is, but... I have read various articles trying to compare different metals in the block, and other than the sense that pot metal is to be avoided, the affect on sound, while I'm positive that it's part of the mix, is probably pretty trivial. I have a Warwick bass that uses their proprietary bell brass frets, and feel the same way about those. (Although they look great when polished; but being brass, dull relatively fast.) I had gone for about 15 years without a term guitar, and have not been surprised that I end up not really using it—but I do have it set floating, with 4 of his springs, and do occasionally screw the arm in and use it. The way I have it is stiff enough not to mess up string bends, but I still get that added Strat spring resonance added, which is just the way I want it. Maybe someday I'll work whammy into my playing style, but for now, it's really just for some songs that call for the effect, rather than subtle warbles, which I manage with my hand. I doubt there any sound difference in the saddles, more the non-sticking out set screws thing.