Here are some to try out. Amazon has samples. I started naming so of my favs then decided to go alpahbetical through iTunes.
Tech-N9ne - Everready The Religion
Tech-N9ne - Absolute Power
Tech-N9ne - Anghellic
Outkast - Southernplayalistic
Outkast - ATLiens
Snoop - Doggystyle
Dayton Family - FBI
Makavelli - 7 Day Theroy
Eightball & MJG - On Top Of The World
B-Legit - The Hemp Museum
Blackjack - Addicted To Drama
Brotha Lynch Hung - Season of the Siccness
Brotha Lynch Hung - Loaded
Celly Cel - Killa Kali
Crucial Conflict - The Final Tic
Do or Die - Picture This
E-40 - In A Major Way
Eminem - Any of his albums
Fiend - There's One In Every Family
The Game - Doctor's Advocate & The Documentary
Gravediggaz - 6 Feet Deep (Must check this out)
Hi-Tek - Hi-Teknology 2: The Chip
Ice Cube - Lethal Injection & Laugh Now, Cry Later
Jay Z - Reasonable Doubt
K-Rino - Fear No Evil & Time Traveler
Ludacris - Any of his albums
Luniz - Operation Stackola
Mac - Shell Shocked
Mac Mall - Illegal Business & Untouchable
Master P - 99 Ways to Die, Ice Cream Man, & Ghetto D
Mobb Deep - The Infamous
SCC Presents The Murder Squad
NWA - Straight Outta Compton
Nas - Any album except for Nastradamus
Paul Wall & Chamillionaire - Get Ya Mind Correct (great great great)
Pharoahe Monch - Internal Affairs
Ras Kass - Soul On Ice
Ray Cash - C.O.D. : Cash On Delivery
Richie Rich - Season Veteren & The Game
Royce Da 5'9'' - Death is Certain (A MUST!!) M.I.C & Build and Destroy
Scarface - The Diary (but any other album will be good as well)
Spice 1 - 187 He Wrote & 1990-Sick
Sporty Thievz - Street Cinema (you can get this for like 3 bucks)
T.I. - King, Urban Legend, Trap Musik
The Team - The Negro League
Tela - Now or Never, Piece of Mind
The Dogg Pound - Dogg Food
Three 6 Mafia - Chap 2 World Domination, The End, Mystic Styles, Hypnotize Camp Posse
Trick Daddy -
www.thug.com (but any of his albums are good)
Tru - Tru 2 Da Game and True (must haves)
Twista - Adrenaline Rush
UGK - Super Tight, Ridin Dirty
Xzibit - At the speed of light & 40 days and 40 nights
Ya Boy - Rookie of the Year
Young Bleed - My Balls and My World