A:AnswerThe headphone still has the 3d audio functionality when plugged into 3.5mm. The controls are on the headphones themselves, no software needed. The headphones have a battery to help power the drivers so you will have to plug the headphones into a usb port from time to time to charge them though.
A:AnswerI don't have a Stewie head but the Headphone band is comfortable enough. I've had it on for at least 3 hours and it didn't really bother me. You can always stretch out the band, put it over a pillow or couch cushions for a day or two and it will stretch.
A:AnswerI believe those may be the Audizee Mobius headphones that you saw. They're wireless and bluetooth but go for 400. I've only seen these in black. They're the same in every way besides the bluetooth and wireless capabilities (hence the price difference)
A:AnswerI haven't used the microphone yet but from numerous reviews they all say the microphone is "meh". For these headphones it's all about the drivers and the 3d positional audio.