Yes, the Sennheiser (!) Evolution series are good budget mics, and quite robust. But what suits one doesn't always suit another! Try before you buy! The average cost of hiring a mic is around £10 for a weekend in England - you do need a sound system, of course!

It's fair to say that a microphone is only as good as the system it's plugged into - expensive mic + crap speakers = waste of time! The amplifier is less of a problem, but you need good speakers!