I'm torn. I'm usually an SM58 guy, and I use a 57 to mic my guitar amp (when I play bass, I usually run direct). Well, this last gig was a small one with little PA support, so I plugged the 57 in just for kicks. SIDEBAR: I used to use an instrument mic for vocals, and I finally got extremely frustrated with the sound I was getting out of it, so I switched over to a "vocal" mic, and a couple of years ago switched permanantly to a SM58. A about five years ago I did a gig where I had to sing on a PG57, and I hated it. The sound was so bassy and compressed. The idiot soundman had put a PG58 on my guitar amp at that gig, so I just switched the mics and was happy again. In fact, after that gig, I pulled out my old instrument mic and used that for my guitar amp, even while I was using a $10 Nady Starpower for vocals... BACK ON TOPIC: For whatever reason, I really liked the 57! It felt like it had just a bit of natural compression, and the stage noise rejection was amazing... I mean, I know that the 57 and 58 are essentially the same mic with a different windscreen, so I didn't expect there to be a huge difference, but what do you know? The only thing I didn't like about the 57 is this. Since my mouth was SO close to the mic, I had to turn the level down farther than usual. This meant that if I stepped even a few inches away from the mic, signal dropped off significantly, so the point where I had to hover near the mic even more than I typically do. This isn't a big deal, but it's something to mention. It'll be interesting to try this out with our big rig PA, and see if the "natural" compression of the 57 is overkill once the PA's compressor is back in the mix. So how about you guys? SM58 or SM57? And an even more broad topic - do you use a "vocal" mic to sing, or an "instrument" mic?