If your pads are fine then waiting to change your set up will not cause any issues. As stated I would start by checking the brake sensor, it may be causing the sound you are hearing. If that's not the issues and your pads are getting near the end of their life I wouldn't wait to long to replace the pads.
For your new pads and rotors if slotted and drilled is what you are desiring I have a great kit found HERE
using our ECS Slotted and Drilled rotors, EBC RedStuff Brake pads, and new wear sensors. If you'd prefer just a slotted set up I also have a kit with our ECS Slotted rotors instead of the Slotted and Drilled rotors which can be found HERE