2. Either way, the only headset to use behind a kit is the Crown CM311a.
A wireless headset sends a message to a receiver box, and that receiver box can be plugged into an amp. But, like all wireless systems, it makes you susceptible to noise.
...with that said, why not just use a corded mic? You're not going anywhere, they make less noise, and you have the option of moving your mouth away when you're sneezing or calling out changes to the band or whatever...