Hi John,

While you can spend $$$$ on the various "Live" mics out there, if you are looking for a great all around Mic with presence, I recommend the good old Shure SM 57 for flute and 58 for vocals. It's the industry standard, built tough, and thousand's are used by groups all over the world. You can pick one up for less than $100 USD, and I'm sure with some looking at ebay or graigslist, you could find them used much cheaper.

If you are looking for a wireless system, check out the Samson Airline 77 systems, they work great, and I saw it at Sweetwater for $299.

Hope that helps you,
Ed