EDIT: Greatest Evers:
DJ Z-Trip & DJ Radar - Live From The Future Primitive Sound Session Vol 2
KRS One - A Retrospective
Gang Starr - Full Clip, A Decade of Gang Starr
NWA - Straight Otta Compton
The Fugees - The Score
Paul Oakenfold - Tranceport
The Beastie Boys - The In Sound From Way Out (collection of all their instramental songs)
D'Angelo - Brown Sugar
Alicia Keys - Songs In A Minor
Verve Remixed (Old Blues/Jazz songs by artists like Billie Holiday & Nina Simone that have been reworked by contemporary djs like Dorfmeister, Theivery Corporation, Masters At Work etc)
The Doors - Best Of
Jimmy Hendrix - Are You Experienced
U2 - The Joshua Tree (can't believe I forgot that one)
Other Kick Ass Albums:
Hip Hop Compilation Albums:
Mark Ronson - Here Comes The Fuzz
DJ Reality & DJ J-Skratch - Ill Billie Behavior
Coup d'tate - A Blow To The State
Funkmaster Flex - The Mixtape Volume 2
Soundbombing Volume 2 - mixed by the Beat Junkies
Underground Airplay (Lyricts Lounge Vol 3) mixed by DJ Spinbad
Hip Hop Artists:
Aesop Rock - Bazooka Tooth
Outkast - ATLiens & Southernplayalisticadillacmuzik
Mos Def - Black On Both Sides
Roots Manuva - Brand New Second Hand
2PAC - Greatest Hits
A Tribe Called Quest - Midnight Marauders
Black Star - Mos Def and Talib Kweli are Black Star
Eric B & Rakim - Paid In Full the Platinum Edition
Talib Kweli - Quality
Jay Z & DJ Danger Mouse - The Grey Album
Jay Z - Reasonable Doubt
House Artists:
Anything by DJ Cl - 32, Get Down, Minimal, What's In It For You
Jay J - Reflections
Trance:
Paul Oakenfold - Global Underground NY Vol 7 (I prefer his classic trance stuff from the early-mid 90s)
Matt Darey - Ibiza Euphoria
John Digweed - MMII
Paul Van Dyk - Out There and Back
Downtempo:
Ocen Drive The Collection Volume 1
Everything But The Girl - Tempermental
Other Random Stuff:
Mr. Oizo - Analog Worms Attack
Scorn - Plan B
Musiq Soulchild - Aijuswanaseing
Coldplay - Parachutes
Rage Against The Machine - Self Titled
Damn that's a long list. Enjoy!!