I was using the Beyerdynamic TG-X 60 for a few years before it completely fell apart from over use. It is one of the best mics I've ever used in a live environment.... aaanyway. I changed about a year ago to the Neumann KMS 105, and it is a joy to behold. Where are you playing (what size and quality of PA wil you be using). I play clubs, and pubs, and if i'm honest, singing soul, and classic rock mostly, and as beautiful as the Neumann is, it really needs a big ass gorgeous PA to fully emphasize how wonderfully it captures the voice.
I could get away with using something a lot less 'good', really. Also, kind of realised i haven't answered your question properly, but the KMS 105 is the daddy.