I love them too - and pretty much for all the same reasons that Marco lists: great sound, cancel out external noise, and super comfortable. I’ve had two pairs in about 5 years. The last pair died because I kept taking them home over the weekend to play Call of Duty 4.
Best place to get them (price and service) I’ve found is: headphones.com.
Cool idea, but I don’t think I could part from it long enough to have this done.