Slowly knocking over the remaining Open Class tours in the career mode. Word of advice for those who haven't attempted A-Class yet - don't use the RX-7 Spirit R. I did my usual performance upgrades like removing weight, adding suspension, driveline and braking components, and wound up with a car that just didn't have near-enough power so I had to absolutely rag it to get on the podium. And this was made worse by two of the tracks effectively being a collection of long acceleration zones (Homestead Road Course and Road America East). And I just can't come to terms with Mid Ohio - it just seems to punish understeer and lacks flow in a lot of places. Still managed to get the championship despite not winning a single race and generally hating the car/track combos.
For S-Class, I tried an old Porsche, the 1993 Porsche 911 Turbo Leichtbau, and what a peach of a car! Could brake much later than the ZL1 GT350 opposition at the front, and apart from at Hakone, had more than enough pace and cornering speed to hang with the best. Great car.
I then succumbed to temptation and took on R-Class with the Diablo GTR, and though I love the look of them, I was expecting the driving experience to be akin to skiing while drunk with a full keg of beer strapped to your back. All that V12 weight up high and ready to pendulum you into a wall at a moment's notice. I couldn't have been more wrong. With the few limited performance upgrades available to it, the car has a very neutral to slight-understeer balance, and is an absolute rocket in a straight line. And it sounds fantastic. Running it in this livery helps too: