Super cool T-shirt! I think I'll buy one...now if he can just do the same for film composers. I'm thinking Korngold, Herrmann, Goldsmith, and Williams might be appropriate. Though I'm sad to leave Bernstein off I think there's clearly a limit of four here.
It is a great T-shirt and I've been debating it. I hadn't picked up that it was Jim Titus though till your post. That is rather awesome.
There are a lot of great t-shirts that turn up on TeeFury & Qwertee. They really are worth checking out daily (or signing up for their emails) as they often are better than officially licensed t-shirts. (I've finally got some great Pinky & The Brain t-shirts)