General rules:

- Slotted, drilled, or dimpled rotors are mostly for bling; plain replacements are fine
- Good pads in no particular order: AEM, Axxis/PBR MetalMaster, Axxis Ultimate, Hawk HPS, Porterfield R4S
- Stainless lines are a big thumbs up in improving feel
- Good fluids, again in no particular order: Ate Super Blue, Motul RBF600, Valvoline SynPower

If you go to bigger rotors or calipers, you will get bumped from SCCA Stock, Street Touring, or Street Prepared classes. (Figured I'd mention that since you might be doing that type of stuff)