Today I drove the P85D with air suspension in the "sport" mode, which my Tesla Rep said was the same performance of the 85D (0-60 time). Then right afterwards, I drove the 70D with coils. I also brought a thumbdrive with me and we listened to the same songs both on the Premium and Standard sound systems.
Performance - the 85D is MUCH faster than the 70D - and particularly from 20-60. There is no question I will be getting the 85D. The 70D is no slouch, but the 85D is right between the P85D and 70D. To me, the sweet spot. We did do one "insane" launch just so my son and wife could feel it. My wife said, "that rearranged my brain. My vision was affected." My son said, "my eyeballs were getting sucked back into my head." That's crazy fast - probably overkill and may get old after about 100 times.
Suspension - the coils are great. They really are. I could feel every bump and even felt some "hollowness" of a pattern of bumps on the road. Hard to describe, but the air suspension floated right over and had MUCH less road noise in this particular section of the road. I love the cool factor and even did the 007 code just to show my kid. Uber-cool.
Sound - We were all less than impressed with the premium audio. Again, the point of this drive was for me to make the decision which ONE to choose - SAS OR Premium Sound. Overwhelmingly, we all agreed we'll go with the air. I'll add a woofer to gain that deep base later - and for much less than the $2,500.
So, my verdict and I'll order this tomorrow:
85D, New Metallic Blue, 19"s, tan next gen seats, black alcantara and premium interior, SAS, Autopilot, and the massively gorgeous pano-roof!