I got the audio-technica pair below for the wife for portable use. Won't be able to listen to them 'til Xmas so I can't comment on the sound quality yet. The online retailer below has a good rep and happens to have these cans on sale with free shipping in certain colors. They're also available in black and white. I got the wife the white ones to match her portable dvd player at Amazon. Headroom is usually responsive and helpful. They may recommend something better for your son's application if you contact them.

http://www.headphone.com/headphones/...ath-fc700a.php