So my back brakes are shot, need new pads and rotors.

While my car was in the shop a couple months ago I got my front pads/rotors replaced, but not the rear.

So now that i'm going to change them myself, would it be worth it to buy drilled/slotted rotors? Might be stupid since the fronts are OEM, but idk much about whether or not it makes a difference in performance.

And either way, whats are some good brakes OEM size for cheap?