This summer I have been testing the Remic v5200-lb microphone on a couple of live gigs.
My band consists of 2 guitarist, a double bass player, a drummer and me playing the fiddle. We always play amplified with wedge monitors on every musician.
The fiddle is the main instrument in this setup, and it can be difficult to get at good monitor sound without feedback occuring.
The Remic proves to be very feedback resistant, maybe the most feedback resistant microphone I have ever tried.
I have had talks with Remic about making me a wireless system to give me even more free room on stage.