I know I am going to own a Model X but I am not sure if I should wait or buy now. The discussions are filled with build quality issues that should have been fixed for MX already and that scares me. It also seems the Model X may get the new M3 battery pack and HVAC system and look when they upgrade. I want to wait for ventilated seats to be put in 100D and was hoping for some improvements in the seat. At 6'6 it would be nice if the seats could extend a bit to provide support. Don't need to be S550 seats but would be nice if they made them more comfortable. I am torn between getting it now and waiting for them to refresh and getting some improvements. Thoughts?