I have hit the 2013 APD and think it's a good update. Babolat keep improving the feel of that racquet. The M 6.0 is also a very solid stick and I think a definite sleeper in the Dunlop line. I think the APD beats it for power, but both are fast, great for spin and offer a crisp feel.
I would probably add lead tape to both, more so with the Dunlop.