Thanks for reminding us about Supertramp. John Anthony Helliwell was the original sax and clarinet player and he was great. He's still around playing in various groups, including a jazz group called Creme Anglaise. More info: http://www.johnhelliwell.com/index.php
I also had such an experience only not with the original (a bit before my time) but this coverband I stumbled upon while I was looking for vids of an famous sax player (guess who...) these guys are doing an amazing cover!