What rotor size are you on? If you aren't on the sport front caliper/rotor size (330mm vs 300mm? or something like that) definitely look at upgrading. This alone is a nice little bump in stopping power.
With regards to the rest, get a nice quality rotor (brembo is what I went with, stoptech isn't bad either, but OEM could also be an option).
I'm not a fan of slotted or driller rotors.. unless you're stopping frequently and really are suffering form heat soak I just don't see a point.. less surface area and higher probability of warping/cracking (but this is just my opinion.. i certainly wouldn't run drilled/slotted rotors if you do any sort of dirty wheeling..)
As far as pads, I'm sure there are plenty of good pad options, but my brembo rotors came with brembo pads and thats what I've been running. Don't go with a cheap auto store pad and you'll be ok.
I think the most important part of the whole process is to make sure that you bed the pads in properly. Follow the rotor/pad instructions to make sure you do it correct. You can have the shittiest performance out of the most expensive combo if you don't bed them in properly.
