I considered the CTS-V brake upgrade but then came across GEN5diy.com's 1LE brake take-off post -
http://www.camaro5.com/forums/showthread.php?t=287397
Great customer service - the 1LE red Brembo calipers and SS Rotors + Goodridge Stainless Steel brakelines are exactly what I wanted for my SIM 2010 RS A6 and the performance is great.
For a street ride with some autocross / SCCA Solo events this more than meets my needs and save me serious coin over the CTS-V option...