so you went with the autozone house brand? let me know how you like them. the warranty is interesting. guy at the store told me that you can exchange them in for a new set when you run them down. something about typical owners not keeping keep their vehicles long enough to go through another set. lol.
i read it's not a good idea to mix brakes that "bite" differently, since ceramics brake better. something about possibly upsetting the traction control, abs system, and/or F/R braking bias.