the Kerry King solo from "Angel Of Death" is the all time hottest, most aggressive solo ever....man, does he give that whammy bar a beating....I also have a softspot for the guitar solo from Nitro's Michealangelo on "Freight Train"
on a more biased note, my guitarist in Black Christmas pulled an amazing solo out of his ass on a little ditty we wrote called "Feel Like (Fucking) A Corpse Tonight" (I'll have to pull that baby off the cassette tape and encode it to MP3 one of these days
)