Last week the plugs on my ApI's bent and broke off. I attended another local show that had the VocoPro (ugh) 5800 UHF 4 mic system and actually thought they sounded good. i liked the fact thay use AA batts instead of 9 volts and last 12 hours.
Found a sale at local store and bought the system for $250 plus tax. Used them 2 times and the singers say they look better, feel better, but more importantly sound better. I usually have to run up to 6 mics anyways with the tourist groups, so putting 4 on the same channel is great instead of having to adjust individual singers in a group.
Solo singers use the SM- 58 wired and duos use the 58 and the audio-tech wireless.
Groups use the cheapo but good sounding vocos for now.
J.R.