you should learn Eugene's Trick Bag (off Crossroads 1986). the most impressive guitar piece known to man. That's a fact, or my biased opinion. one or the other...

here's a link to a good chunk of the song
http://www.vai.com/audio/clip_crossroads-etb.mp3

I've got the arpeggios to about 3/4 speed and most of the other stuff to about 4/5 speed. It's a devil and I've been working on it for months. One thing I will say though, it has done wonders for my alternate picking.