You could all shoot for Metallica's remake of The Prince or Bliztkreig. On that note, you could try Countdown to Extiction by Megadeth, Everlong by Foo Fighters, or Cry by Norther.

As for Crazy Train - I always thought it was a hard song to play until I acctually got into it. After reading Dr. Simon's post to learn it I decided I try it again after not doing so well a while back. The fills are wicked fun, and the solo is pretty easy as well.