Thanks very much for the early impressions from P3D, Jarrad - that's great to hear!
I'd second the recommendation to run photoscenery off an SSD for P3D - I only run Hawaii Photoreal, but it certainly did make a difference in how quickly the tiles resolved on my system.
Also wanted to add that I was experiencing blurries with Gold Coast (which uses the same tech) but this was traced down to to a conflict with AU and Vector - since getting that sorted, terrain draw has been sharp even into the distance; here's hoping that's a good preview for how the other TrueEarth regions will behave...