luke667-I've always found "big brake kits" to be a worthwhile upgrade, even on "babied" street cars. You won't have a problem with "too much braking", rather, it'll give you a better sense of what the brakes are doing and they won't fade on you. It's really a good idea, IMO. People spend a bundle on things that aren't nearly as important as stopping.
But as IanO said, you gotta watch it with the cross-drilled rotors, they DO sometimes crack (and I'm NOT talking about track-type abuse, just regular driving). A number of the aftermarket brake suppliers I've dealt with do NOT recommend drilled rotors, at least for some applications. Hey, you don't want anybody dying over this
2wheelsx2 has the right idea- you gotta find a setup that has the right "feel", that is, right for YOU. And everything has to work in concert, from the master cylinder to the pads and rotors. If you're gonna do this, do it right so you don't waste time, effort, and money (or make your ride unsafe). Find out who makes good kits for your vehicle and get what they recommend. Get the right pads for your driving conditions, too (rain?). And make sure your chosen rotors/calipers and wheels are gonna work together. Sometimes it's surprising what does NOT fit (it's not just a matter of wheel diameter).