Anyone ever converted their garage?

I have a big two car garage attached to my house with access through the kitchen. It is as far away from the bedrooms and other living areas of the house as possible. It seems like it's always full of junk and sporting gear to the point where the cars are in the driveway. My wife threw the idea my way today of converting the garage to audio room and putting a shed out back for lawn care equip., and keeping all the sports stuff in our walk out basement.

Anyone here ever convert their garage for audio? Seems like a good way to go: electrical service panel right there, concrete floor, structure already built, etc.....