i can't think of a specific 1, its a tie between three songs for both best solo and best song. i like long, growing, powerfull emotinal songs. i don't look for long songs, they just turn out that way. so in no paticular order, my three favorite songs/solos are ...

1. Freebird - Lynard Skynard
2. Stairway to Heaven - Led Zeplin
3. Paranoid Android - Radiohead

as i said they are not in any paricular order. a close 4th and 5th were ...

4. Sweet Child O' Mine - Guns N' Roses
5. You don't fool me - Queen

again these are not in order. its strange but all these songs are over 5 mins long. i didn't plan it that way, i just think that these songs are perfect in every note they have, and they have more than most!