[docscholl]

For what its worth, a mic is only as good as the voice going into it.

I understand that John Lennon used an SM57 to cut a lot of his vocal tracks.

You would be wise to do a mic shootout.
See which sounds best to you in the environment that you'll record in.

Personally, I love the warmth of my KSM27 on my more mellow songs but the SM57 or 58 handle my screamer sessions perfectly.