Is this a dedicated track car? NO street aka daily driver use?
Or is it a daily driver now, thats being slowly converted to track only?
That answer will depend on what's best (also make/model).
For performance reasons, drilled & slotted rotors are the choice because of reasons posted above. (Less weight, gas dispersion).
On my (daily driver/weekend race car) 2005 Z4 3L I put Brembo GT 320mm kits all around and switch out the pads for track days/PCA (Porsche Club@Road Atlanta) events with track only pads. Once up to proper temps, track only pads work well, they WILL suck for daily use because you can't get them to maintain the proper temps.
@Tig: My weekend expenses (brakes, tires, fuel) are around $1000-1200 That doesn't count any entry fees, repairs, fixes, making sure it'll make it back-n-forth to work on Monday.