Else what's a heaven for?

American Express is doing a promotion that ends tmw where if you use it on iTunes, you get 5 free iTunes songs, and by you I mean me. What should I buy? I figure if they're free, I might as well use them to expand my musical horizons beyond the dance remixes of Top 40 and showtunes that constitute my usual iTunes purchase. I like house, alternative, opera, and power metal.

Edit: I ended up buying

• "This ain't a scene it's a arms race"
• "Thanks fr th mmrs"
• No One Gets Left Behind and War is the Answer (Five Finger Death Punch)
• Two Angry Kids (Street Dogs), and
• "The Sound of Music" (Brooklyn Rundfunk Orkestra)

. Thanks!!