That's interesting John, I did the exact opposite as I could never get a good vocal recording using a dynamic mic (Shure SM58) - probably a combination of poor vocal/ mic technique and lack of experience with my chosen DAW.
However, since I switched to a LDC mic, I've achieved significantly better results. That said, it does pick up 'everything' so I just need to set up properly to eliminate any potential squeaks, rattles and clicks.
Andy