Another option is
Powertrix. Charles Park is the owner and a 370z owner. Try sending him an email and you might be able to get a better price than listed on his web page. He also offers Swift springs as an upgrade. I have the sport street set with Swift springs and been very happy with the set up.
Nice review on the forum
HERE by axemea?
I would also recommend planning for camber arms and toe bolts for the rear.