I'm on H&Rs and love it. Sits low and looks great. Ride quality is stiffer that stock. I love it. Please don't compare it to coilovers or swifts+yellows which a lot of swift fanboys do. The ride will be different. Mind you, Springs plus yellows take you entry level coilover territory. Unless you upgrade to springs plus better shocks or coilovers, you're only making it look really good.
If you are going for a nice, planted, and low sitting Z go for the H&Rs. BTW, I have rear camber arms and none in the front.
Stock tires
w/PSS tires on this one.