There's a reason the Shure SM57 is an industry standard.  Useful in a broad range of applications, you just can't go wrong using this on guitar cabs, horns, drums, congas, whatever.  Best for live situations, although they can be useful in the studio, too.  They're still built like tanks.  Sure, there are "better" mics.  But bang for buck, you can't do better than a 57.