For a wired mic, I use both a Gray Radio Shack mic, and a Shure RS-230, also bought at Radio Shack.
They're covered under warrenty there...
The gray one is a damned good mic, but the wires that connect to the mic element are on the side. And if a mic gets nailed, you can open it up and see one of those wires detached!
!
Now R.S. has replaced it, but I've finally seen the light, and only use the Shure mic that they sell... I think it's the same thing as the PG-58... just packaged for Rat Shack.