Ooooooooooh Megadeth solos! Excellent choice my friend, you will learn a massive amount working on their material. My advice, go to amazon.com and buy the tablature for Rust in Peace. A lot of Marty's solos sound harder than they actually are, he has a real unusual style that involves unpredictable bends and exotic scales. I guarantee you will be a better guitar player from evenb just working them out even if you can't play them as per the cd. Also, check out youtube, there are plenty of Marty Friedman instructional vids online. Worth checking out too.