I feel like a broken record, maybe I should become a Carbotech spokesman or something.
For rotors I use cheap Chinesse blanks, usually from NAPA.
Pads, Carbotech:
http://www.nyspeed.com/forums/showthread.php?t=20394&highlight=carbotech
As you can see a set for all for all four coners even in street compound is $200+. I am usually a cheap fuck, but in this case you get what you pay for.
As for the Z, metal to metal. It is sitting in storage and won’t get the love it desrves until I get out of school.
But in your case I am sure you will be fine. Yes there are benefits to buying a quality blank rotor that will last for more than one set of pads, but my philosophy is they are disposible.