i dont have a transmarobird but ive driven a heavy car around a track a lot, simple advice is, nothing less than ATE superblue and Hawk HP+ or equivalent. not to sound cocky but even lighter cars driven hard without the right pads and fluid, dont make it more than 10laps before having to come in. in a 3700lb turbo car hawk HP+ and ATE, i could comfortably pull 30min sessions with a few (tire/brake-save laps), yah the pedal would sink 1/2in-1inch but the brakes were still within their upper limits and felt solid in that zone, i attribute that to good fluid. I ran the ATE powerdiscs in the front, and vented plain face in the rear, im going to step up to hawk blue’s this year or Porterfield R4, but if you want a Good Pad, the price range is about $90-150 for front pads
edit: i use a deditated set of rotors for the track to go along with the track pads, might as well get plain face brembos or something you can burn through after 2-3 events, no sense in heating the sh*t and possibly warping better rotors if this is just a weekend thing…