Audix OM7, Sennheisser e865, and the Telefunken m80 are some of the better vocal mics that won't break the bank. I have just recently used the EV e/n mics (the ones with the flat grill) and like what I've heard so far. It really all depends on how much you need in your monitors... sometimes you have to sacrifice a "natural" sounding vocal mic for a mic that can get extremely high gain before feedback.
I've been doing live sound for sometime and have a good collection of vocal mics. The comment that there is not one mic for all is spot on. As for the mics listed above I have 2 of these models. The OM7 has great isolation and needs gain. It doesn't handle plosives well so a wind screen might be needed for those that like to swallow the mic. I usually use this for drummers that do harmonies. It is not my go to mic for lead. It is a bit gritty sounding. The M-80 requires significant EQ'ing to make it usable. It has a very hyped high end and is edgy and zippy sounding. I never use this mic. and most, if not all singers do not like the sound.
I had a Senn 935, and it was a great sounding mic but mine was cardiod and could take on too much of the stage. I have heard good things about the 945, which is somewhat the same but hyper.
I have the PR-22 and 33 and both are safe mics. Nothing bad to say about them.
I also have some Shure 87A-Beta 87's. Which are nice condensers for vocal that won't break the bank.
I have a few older Senn 431, which I tend to use more often, which provide excellent sound for live shows. I also have a Neumann 105. Great sound, poor isolation.
My newest baby is my Shure KSM-9. The best live vocal mic I have used to date....but expensive.
I also have a few AKG 535's and Beyer M-88 but seldom use them.
I have others but in summary, I would say the Heil's are a good chioce with a ebay search for used old style Senn 431.