I started with dead rock as well, just did not want all the possible critters that comes with live rock. The tank took 6 months to really stabilize for me. If I did it again, I would add fish to the first 3-4 months and some easy LPS/zoas until parameters stabilize, and then slowly add sps around 6 months... Patience is critical in my experience for long term success with SPS, and stability of a tank not only requires diligent husbandry but for most of us 'tincture of time"
Mark