Right now am I learning a friend of mine how to play guitar. We begun with "Judas Priest - Breaking the law" (guess you understant why =D ).

Personally I still try to play Dream Theaters songs:

Overture 1928 and Strange Deja Vu in one piece with no misstakes.. May not sound difficult, but one solo in Overture is truly a pain in the ass..

I also try some old Yngwie stuff from Rising Force and Oddysey.

Some sweep as well and some christmas songs.
6:00, perhaps.. Hrm..