If you're a good singer, yes. A better condenser might capture more of what you have to offer.
On the other hand, an old-fashioned Shure dynamic mic like a 57 or 58 might be just what is needed. Lots of great records have been made with people like Dylan or Bono singing into these standard 100 dollar mics. But yeah, a good condenser is nice. I have an AKG 414 and it works way, way better than my MXL beater that I sometimes take to gigs.
And then there's the whole ribbon thing. that's on my G.A.S. list at the moment!