Well, you need to add "The Legacy" from Souls of Black on there as well. Great song! The instrumental "Musical death (a dirge)" from The New Order could also be added...
And remember that Testament released acoustic versions of "Return to serenity", "The legacy" and "Trail of tears" on the Live at the Fillmore album.
And if you wan't a beautiful ballad that is Testament related, you should check out "Touching The Earth" from James Murphy's solo album Convergence. It features Chuck Billy on vocals. It's a great song and in my opinion one of Chuck's best vocal performances...
Just listened to Touching the Earth, this is a fantastic song. Listening to the album now. I might buy it, good stuff. If only there werent so many other cd's I need to buy.