Best option - (obvious) Tesla's carbon ceramic brake package. At 15k, it is a comparative BARGAIN, and absolute killer performance. Also don't believe the bs about not tracking carbon ceramics.
Maybe this was an issue 30 years ago, but is a non-event today. Track away happily, I doubt anyone could ever kill them (at least by driving on them!)
Lower cost options are around, just not as good. Mountain Pass Performance and Unplugged both offer larger two-piece iron rotors front and rear - these seem pretty decent. Coupled with an aggressive track pad this should do pretty well. There's some gains to be made with vane-cooled rotors but simple physics dictate rotor weight is your thermal fuse (i.e. more rotor weight = better for fade resistance). This will depend on your driving too, "light track use" might be fine. Results will vary.
I personally am not a fan of the Unplugged Carbon BBK upgrade kit. It looks a lot like it was lifted from another OEM application (that was a common supercar with similar performance but less than half the weight). I'm suspicious, although have no proof of this. I Could be totally wrong. Also it's an older rotor technology in the scheme of carbon rotors. Having said that, it's still probably the best carbon aftermarket kit available, Just not for me.
Improved Cooling definitely helps - the shields are good for street but hurt/limit cooling on track. Dump them, or invest in brake ducts which are very effective (at speed). The shields definitely help on street though, especially through winter. So it's a PITA... Unplugged have ducts which look good but are damn pricey...
Brake hoses help a bit, but it's marginal. Worth it paired with other mods, but probably not on their own.
Brake fluid change to a higher performance fluid definitely helps. But be careful - "racing brake fluid" is great for racing, sucks for everyday. It is more corrosive, and turns to treacle in cold weather (sketchy for ABS). Also it should be flushed after every few trackday/weekends. Be warned. I'd stay away.
Just get a high-quality, performance/street DOT-4, and flush regularly (after trackdays). Any Performance-OEM approved High-perf DOT-4 should work. Tesla has a really great fluid they offer(ed?) on the M3P track pack but it's stupid-hard to find now. But if your SC can get it, it is approved for all vehicles. Just nobody knows about it...
I like your Tsportline option, Brembo kits are usually pretty fantastic. Pretty decent price too. Maybe a good pairing with a larger rear rotor combo? Good luck, Let us know how you go!