not "advanced" enough.
but heres an answer:
whenever you replace pads, it is best and most recommended to have the rotors resurfaced (given that there is enough rotor to resurface). its a fairly inexpensive job to do for any shop. pads and rotors wear together so new pads on an old rotor wont wear and bed-in properly and vice versa. think of them like a couple. if ones old school and the others new school, they wont get along properly and will have an unstable and "shaky" relationship. lame analogy i know.