I think spl stuff is a little overkill for a street driven car. I would also avoid spherical bushing on a street driven car as the joints can get damaged prematurely depending on the conditions you drive in. Spherical bushing are prone to rattle and make more noise than most are ok with during street driving conditions.
I would recommend sticking with rubber or urethane bushings as it will keep the nvh closer to stock. As far as what you need, try the spc kits
front and
rear. The front kit offers tons of clearance for wider wheels and tires which may be why you z1 front arms dont fit.
Good luck.