If you like HP+, you'd love a Pagid Blue. That would kick a lot of ass on this car.
My understanding is that a lot of EBD/ABS/whatever systems will send more bias to the rear under light loads, but under heavy braking it's more mechanical in nature. So if you're locking up the rear under heavy braking at the track I'd wonder if the bias is built into the system via rotor diameter and piston sizes. But I have zero experience with the S2k so I'll stop talking.
- drew