[Callers] Headset mics

Hi all I was just working a wedding gig and my old Samson headset mic crapped out. If the piano player hadn't had hers along, I would have been in serious trouble. Time for a new and more reliable headset mic. I use my hands a LOT when I'm doing ONS gigs, so a handheld cordless isn't really an option for me. I'd love recommendations from any of you about models to look at. I'm planning to plow the funds from this wedding and some of my caller piggy bank into a new mic, so I want something that's really good quality. It doesn't have to be tiny and invisible, but it does need to be reliable. If it doesn't have a belt pack that's a plus, but it seems like most of the good-quality headset mics have belt packs. I'll deal with it if that's the best bet. So, recommendations? For reference, the one I was working with was a Samson Airline 77, often referred to as the "aerobic instructor mic." It had the transmitter on the headset, so there were no wires or belt pack, and it worked just fine for a long time until suddenly it didn't. I would like to hear what folks are using who rely on a headset mic for their calling gigs. Kalia Kliban in Sebastopol, CA