[MidgetMage55]

So far I have yet to find anything that connects audio by USB to auto-switch. I deal with recording interfaces daily at work and every time we set up a new one we have to go in to the audio controls in windows 7 and tell the system to use that as default for input and output.

I've found the same to be true when it comes to WoW and i connect a USB headset. That's not to say they don't exist. I just personally haven't come across one that does.

The air flow issue is common for closed-back headphones. Some designs use cloth covered padding as opposed to the vinyl covering which is less breathable. Not to mention the heat generated by the electronics in a wireless system as well as the light are going to add to the issue.