I wanna start listening to some classic thrash (Anthrax, Metallica, Testament, etc.) and take my music back to its roots. I need some inspriation for writing songs for my band.

Anyone got anything good?
You'll want to go further than thrash metal for the "roots"

But that aside, just google thrash metal, get a list together. then hit up sites like deezer and get your listen on

Don't let your boat be empty, don't be a sunken dream
Don't let the boat regret thee, for what you could have seen

Venom is one of the forefathers of thrash and black metal. Metallica has also said that they had roots in the New Wave of British Heavy Metal (Iron Maiden, Judas Priest, Motorhead, etc.)
Bands to see before I die:
Iron Maiden
Foo Fighters
Reel Big Fish
Streetlight Manifesto

Epi LP Standard
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Google "Municipal Waste" and check out their myspace. Probably one of the coolest thrash bands I've ever heard.

Jackson DK2M -> ISP Decimator -> Peavey 6505 Combo
Iron Maiden, Saxon, Dio-era Sabbath is good.
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Quote by Anonden
You CAN play anything with anything....but some guitars sound right for some things, and not for others. Single coils sound retarded for metal, though those who are apeshit about harpsichord probably beg to differ.
The Showdown, Dead Season, Sepultura, Pantera, Mastodon, Metallica, Megadeth, Anthrax, Motorhead, Mercyful Fate.

Those should get you running.
The Pit. The Movie.