Steel studs don't transfer vibrations as well as wood because they're less rigid. Therefore you get better transmission loss between walls, which is what you're after.
Last time I checked they're more expensive than wood, so it's a matter of balancing what you can afford with how much isolation you need.
Sonic Clang - I've been watching your studio construction videos and want to say "thanks" - they're educational AND entertaining! I totally had no idea you lived in Mad town. I moved here about 9 years ago and love it!
I checked out a few sites and will probably go with the steel dspite the cost.
Well, technically I'm in Verona, but same difference. My parents technically live in Madison, but it used to be Verona. Anyway, I'm glad you've enjoyed the videos so far. Only one or two episodes left, then it's done.