This sounds pretty much like the same kit BATinc sells (12" rotor + 4 piston wilwood). Theirs is listed at $695, but unless something has changed... they're out of stock and cannot find replacements for some components. This kit (VisionOneAutosports) does sound like a good replacement for the mid-cost performance range.
By mid-cost... I'm referring to Focus SVT=low cost; Baer/TCE=high cost.