AMT SP25B mic ("Super pre-amp" version):
$490. Currently selling for $928 at Lemur Music. I will pay shipping (US only).
http://www.appliedmicrophone.com/products/show/12
I had a local electronics expert alter the cord so I could unplug it and leave the mic on the instrument. This fixes a problem I had with the design -- that the cord is permanently attached to the mic. I didn't like the cord laying on the floor still attached to the instrument during set breaks, waiting to be stepped on or tripped over.