Be aware that slotted and/or drilled rotors are somewhat noisy. And they get REAL noisy, if driven in salty conditions. Akebono make a VERY good ceramic pad, I use them myself.
Bottom line is the smaller Journey/Caravan brakes are just too small. You can use whatever pads/rotors you want, they are too small. There is no "fix". If your that concerned , I would put the newer stuff on, but its gonna be pricey. The bigger brakes work SOOOOO much better, esp, if you are hard on them. Go and test drive a new one, and you'll see what I mean.