In The Presence of Enemies Pt.1 by Dream TheaterThe only real technical part is the unison at the end and a huge badass lick in the middle of the song, other than that it's quite easy for DT.
If you really want to develop almost every technical aspects, try
Master's Apprentice or Deliverance or The Lotus Eater by OpethWelcome to Buckethead Land by BucketheadIf you can tune down then
Man Made God by In Flames,
Bodom After Midnight by Children of Bodom (Maybe not solo, but it's not that tough) and I could go on but that should do it.
Maybe
Forsaken by Dream Theater, but not the solo, unless you can nail some massive tapping + shredding

But other than that, the pre-choruses leads are incredible and very technical, and the whole riffs are very cool to play.
Enjoy!
/E
Burden by Opeth, sick solos, I'm sure you will love the song.
This post was edited by Darkshade on Nov 2 2009 07:05pm