If you want a good example of 2nd wave ska, listen to some stuff by the Specials and Madness. Specifically listen to One Step Beyond, A Message to You, Rudy (a 1st wave cover) and Little Bitch, all 3 some of the best ska songs ever recorded in my opinion- A Message To You, Rudy, is very traditional as well. Two Tone ska is the best for skanking if you ask me, although I personally like 3rd wave better.