What microphone(s) do you recommend for vocals for studio recording?

I bought an Über-cheap MXL 990 condenser mic a while back, and it's about as cheap as you can get... but it's not horrible.

I have used it for voice overs for video instructional material, and I am quite happy with the result. I haven't used it for any singing though so far. For a starter mic for someone on a tight budget getting into vocal recording, I would recommend it.

Now, how about them more professional mics, those with experience, what do you recommend?