1999 10th AE MX-5/ Scion Xb
for project mu u have to try the HC+...the b power and NS are there 1 step up from stock pad. HC+ are the track/street pad.I had HP+ on the STi. Loved those brakes. The negative is how much they dust and how badly that dust will destroy your rims if you get lazy.
I had project Mu (b power as well as NS, I believe) on my old Honda Prelude. They sucked. I still got brake fade just from spirited driving every now and then.
My roommate had Axxis Ultimates. Those were a really good pad. Better feel than my Project Mu pads and cost less.