I purchased my car from Jerry's Weatherford, and I highly recommend them. I had my service done at Texas Nissan in Grapevine, and they were helpful in that respect. (The salesperson and his manager I spoke with about purchasing a car dissuaded me from buying the car there.)
Read my above posts for the story, here's some pictures. There are pics in my album of the car with the hatch open and closed to show how well the new springs work.
The newest part number for these springs is
84415-CD71A, not to be confused with the 84415-CD715 from before. I'm unsure what the difference between the 2 is.
Nissan 370Z Forum - vipor's Album: Rear Hatch Springs