Yes, Transfromers is a good movie for auditions. You can also try the Bourne Ultimatum, Das Boot, U-571, Day after tomorrow, Fight Club (E), Godzilla, Finding Nemo, Incredibles, Monsters Inc as well as all the LOTR etc.
For music you can use-
Claire Martine, Holy Cole-Temptation, Patria Barber - Cafe Blue, Diana Krall-Live in Paris/All for you etc.
For male voices, you can use Billy Cobham-the best of, Eric Clapton-Unplugged, James Taylor - October Road etc.
Nitin Sawhney - Beyond Skin is a good bass tester. I'm not a huge rock fan but once in a while I listen to the likes of Metallica- Enter Sandman - the bass shakes my entire house! Just for the kicks
I hope this helps.
All the best.