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I believe both above options are r90 rated (not classed as a modification/road legal). I've never personally used the pf z pads, but they do get good reviews. The brembo hp2000 are good in my opinion and are OEM +, they're quiet and work from low temps, but will take a spirited drive. If you're just looking for standard pads the pagid ones from euro car parts are cheap get good reviews.
The brembo hp2000 are a sports pad, I got mine from scoobyparts although price has gone up considerably, euro car parts sells standard brembo pads as well but I believe they aren't that highly thought of, the pagids get better reviews than the standard brembo pads. Pretty sure there's been a few threads on here about it.
if you drive your car around slowly yeah stick with the o.e Brembos,but if you want an upgrade and a better all-round brake pad compound then go with the PF/Z-rated pads.SJ.