I know mostly, it's a matter of opinion. However some supporting facts could be useful. I know which one is mine, but I'll reveal that after all is said and done. TYVM!
Like the best value for the money? I would guess LT since it's not top end but not bottom end, but I have no idea. Personally, I really like the LTZ with the heated and cooled front and middle bucket seats, dvd player, auto running boards, huge rims, and the chrome-highlighted grille. From what I understand, the Z71 is also very nice, but I haven't really seen any of those.