Jarrad, just flush your fluid out and put rbf600 or similar top quality fluid in. the a1rm pads are fine for your use and power.
what you really need is better tyres and to work on technique - brakes make you go slower, not faster. Grab me at the next trackday and we can have a look at how you are attacking the corners.
the swaybars will help heaps too, very good choice to upgrade those.
also, get a wheel alignment if you haven't had one done for a while. Nothing track specific, just make sure everything is straight and consistent.
Lots of things you could do if you wanted to take it all further, but if the car may be leaving just do the little bits and enjoy it