Very soon I plan on going with a budget front brake setup..
The 14" Summit rotors and CTS-V calipers/pads I already have.. In fact I had a machine shop make me brackets a few years ago to adapt them to the sprindles around the 14" summit rotors.. I think I will have $450-500 into rotors/calipers/pads + machine shop building the brackets.. I just need to figure out the stainless lines to the Brembo calipers.. Definitely not as cheap as you mentioned, but waaaaaaaaay cheaper than the big brake kit.
Here's some a pics:
