I've had good luck with Shure and Audio-Technica stuff. The best advice that I can give is that you don't want to cheap-out and get the least expensive thing you can find. Cheap wireless systems are just all-around bad and will give you issues. A good system manages RF and channels to a much higher degree.
dabass, I have the same question. I need something for around the house practice, and I'm not finding much info on cheap ones here on TB. Did you ever get one? Warpeg, What cheap ones have you tried, and what problems did you have? 057912