I think I would need a real car and real tires to go with those real brakes. Serious answer.
But you already knew that, given my comments. Other than the 240s, I come from a world of econoboxes. Sure, I'm curious about driving on a race track, but would likely get laughed off the place, so I don't dare. Well, not to mention the term disposable income is an oxymoron. Not to mention "don't risk your only viable transportation."
This is why I'm asking the questions. Can you (or anyone else) provide a convincing description of what this experience feels like, what it allows you to accomplish, rather than just a string of superlatives? I still don't see the point to increasing stopping power if the car is at the limits of what even a top-of-the-line Grand Touring tire can accomplish, unless I also add ABS which I have mixed feelings about.
I guess I'm kinda looking for a salesman. By the time you add up brakes / rims / tires, this is an investment that could double the purchase price of the vehicle.
Would be good to really understand why it's worth considering... especially when mashing the pedal in a stock 240 will put a nose print on the inside of the windshield...