Okay, I don't know if this is a good place to post this or not, but I'm in need of a sound system for giving some talks to a decent sized room w/ approx 100 people or so. I need some sort of headset mic. I also need to be able to plug in a computer and perhaps some other sound device (some sort of mp3 player). It would be nice if this stuff was wireless. I need it to all go to a smallish speaker (but still reasonably loud) that is easily portable as I will be going to many different places and don't want to spend a whole lot of time having to set it up. I'm also wanting to record everything that I send to the speaker. I'm completely new to this stuff and don't really know what I need or how to get it done. Would it all run into some sort of mixer and then go through a recorder then to the speaker? I don't even know. But I'm really not wanting to spend less than $600. Any suggestions? Thanks!