Okay, I know this is a sax site but it's the one place I know I can get some good, sound advice. My wife is a singer and would like to purchase a wireless vocal mic. I looked around Musician's Friend and found a Shure system, an AKG system, and an Audio Technica system. Not too crazy about spending $400 and up on a mic system but I don't want to get her a lousy system either. Any advice on good, relatively inexpensive wireless vocal mics would be appreciated. Any reviews on the above mentioned systems would be appreciated too. Thanks in advance!