Top five today really needs to be top 500... too many to list but in no special order and trying to add ones I love that ain't been listed already
Led Zeppelin - Black Dog (Pick a Page Riff really they are all epic!) Hendrix - Voodoo Child (slight return) Pantera - Mouth for War (Again one of too many to list from Dime) White Zombie - Thunder Kiss '65 (Could be any riff from J tho imo) Korn - Here to Stay
Oh,this is hard. I'm probably not gona be satisfied with my answers but here it goes anyways..
1. Rush- 2112 II. Temples of Syrinx 2. Dream Theater- A fortune in lies 3. Porcupine tree- Fear of a blank planet 4. OSI- The new math (what he said) 5. Judas Priest-Rapid Fire