just make the coilovers yourself with the ground control kit and some 280ZX struts and brakes, paint them pretty and whatever else.
Save yourself the cash on the datsport stuff. the only thing I have seen them make that I like is the steering box brace. There was one one ebay last week.
As for the rear brakes, get the rear disc bracket from DAMB engineering, and mount up some Maxima rear discs. I think the e-brake linkage still works with those as well with a minor modification.
Rear coilovers? I dont know too much about them, except that they are EXPENSIVE.