I just got mine mounted today. I'm riding about 50% park, 50% everything else. I'm 6'2", 170lbs, 28boot, 185 ARV. Dead Center is 7cm ahead of recommended. I decided on 3.5cm ahead of recommended so I could ski switch well and still have enough tip to float in the pow.
-2 is fine, I was mounted -2 on 07 ARV's and they rode great in pow. My budies all ride true center (on seths and maidens) and they kill pow and big lines. Its all about what your riding style is, and what your used to.