please dont waste your money on HPS. stock pads are better than HPS. go HP plus at least. HP Plus would be a compromise that you could run for both. they squeal and they make dust but they stop decent and they wont wear your rotors bad so that you can run them on the street.
since you are on a budget, id say just get some HP plus pads for the front. make sure you have hi temp fluid in there and bleed before every event. i dont know those rotors that you are running but if they are slotted all the way through then id guess that freshly turned stock rotors would probably be better.
ceramic pads are for a Bentley. as someone else said. if they stop, then they will squeal and make dust.