I use a SM81 Shure that a Dallas studio was throwing away cause they said it had distortion. Took it apart and cleaned it with spray contact cleaner, and used it ever since. I have a SM58 and a SM57, but they sound muddy to me compared to it. Also have a Shure PG81(another free one) almost as good as the SM81, but I only use one at a time. Some times when I record my guitar amp at very high volumes I use a very old Shure Unidyne B. Eric Johnson told me call when I want to sell it, he used them live back then before he was mega-famous. It was the first mic I ever owned in the early 60's, my Dad's old used one.