Children of Bodom: This is, I think from a guitar exercises video.
More Children of Bodom
Even if you don't like black metal, give these two a shot.
This is ordinarily one of those bands where while listening you roll your eyes saying "we get it, you can play fast..." but these two selections are actually pretty enjoyable, if you like black metal.
I've listened to both of these nearly a dozen times each in the past few days.
I like Opeth a lot too. And Rush. I'm not an oldie, but I listen to them probably more than anything else. Peart's a fucking monster. Lifeson and Lee don't trail far behind him actually.