The brakes won't fit under the WRX 16 inch wheels. The brakes are the same 4pots Subaru brakes (painted red) people have been swapping in for years.
Regarding pricing:
SOA rep on hand said that Tuner Ready "TR" edition is Real! Pricing is expected to increase by $100 - $200 on STi and WRX models. TR model is expected to cost around $23,000...close to the original price of the 2002 WRX.
If you're considering a WRX Wagon Limited it might be worth the while to keep an eye on the Saab 9-2x as it will use the new 2.5L platform. Most likey it will even add a few goddies over the Subaru. The Saab are currently being sold under the GM pricing and the current 2.0L Aero (WRX/Turbo) models are going OTD for around $20,000.