Anyways, his best album is K.O.D. (imo). But, his most accessible ones are Everready and Killer. If I was you, I would also get his EP's Seepage & Lost Tapes of K.O.D. because both have some classic material.
In conclusion, I would recommend K.O.D. first simply due to the fact that I truly believe that it's one of the best album ever and HIS best. All his albums are really good though. Killer is the only one I don't LOVE because it has some fillers (due to it being a double album) but then again it has genuine Tech N9NE gems like One Good Time, Happy Ending & Hope For A Higher Power, Too Much is intense as fuck too











at Tech's verse. ALL those "b" words in that one verse is incredible and astounding, though.
