Assuming you don't have a specific genre preference? Here is a list
Hoobastank - Crawling in the Dark
Chad Kroeger - Hero (spiderman soundtrack)
Boomfunk MC's - Freestyler
Alien Ant Farm - Movies
Goldfinger - Carry On
Green Day - Minority
Incubus - Drive
Incubus - Circles
Leann Rimes - Can't Fight the Moonlight (dance remix)
Matthew Good Band - Carmelina
Nickelback - How You Remind Me
Nickelback - Too Bad
Powerman 5000 - Standing 8
If you're going to download any of those songs for good bass, download the Powerman 5000 song. You'll understand once you hear it
Btw I have 4.1's, they're awesome... too bad I'm too poor to get 5.1's
