OK, look, I don't understand why this topic keeps coming up.
When you mash the pads do your ABS engage? If it feels like your brake pedal is trying to hump your foot then that's your ABS engaging. Your ABS is engaging because if it didn't then you would lock up one or more of your wheels causing you, in all likelihood, to catastrophically lose control of your car. If your ABS is engaging that is because your stock brake pads are generating more stopping force than your tires can cope with. If you were to buy pads with a higher friction coefficient then guess what, you're still going to hit the ABS and you aren't going to stop any quicker. in fact, you may stop slower as high end pads require heat to brake at full force.
If you answered yes to the above question then why in the name of Christ do you need 'better' brake pads?
Are you experiencing brake fade? Brake fade is when the pedal gets very spongy feeling and your stopping distance progressively gets longer and longer.
If you answered yes then there is something horribly wrong with your brake system. You cannot get brake fade on the street in an MR2 Spyder. Anyone who says otherwise is either a liar, or there is something wrong with their brake system.
The only valid reasons for upgrading brake pads is:
1. Coming to terms with the fact you are a ricer, admitting as much in your first post, and asking for ricer tips; or
2. You track your MR2 competitively; or
3. You bought slotted and/or drilled rotors, which will make your brake SLOWER because you subtracted surface area between the friction surface and the disk, and you need a higher friction pad to compensate.