805 owners help me with volume

I have an 805 with the speakers listed below and i just can't get the volume i want. Let me tell you what i have done so far, i ran audessey, then bought SPL meter and manually set the levels to 75db ( audessey was almost perfect at) and when i watch a movie i have to turn it up to -2 or +2 on the receiver. After about -10db there is not much of a difference in volume. I have read that this receiver does that to keep it from distorting and to save juice for peaks in movies but i do not know how how this works. My old onkyo HTIB receiver (505 i think) with the same speakers would pump music form the same DVD player loud. The volume on the 505 was at about 40 and now even when i turn up the 805 to +18 it is not even close to as loud. beleive me at +18 you still can talk in the room.:mad::mad:Also is anyone pissed that for zone 2 you have to run RCA cables because you can't send a digital signal even though it turns off the rears and zone 2 is using the same signal it used for the rears.