I ran a Baer 4wd setup for about a year before switching over to the MUCH lighter Aerospace setup for drag racing....
The Baer system ran me close to 2k for a complete kit... no trips to the hardware store, etc. Excellent kit for a street car/road racer as the braking ability is twice that (and some) of the factory brake system. We're talking throw you through the windshield stopping!!! I opted for the cross drilled, slotted, and zinc washed rotors and they look SWEET with a set of 17" wheels or bigger. I just caught the drag racing bug and later got the Aerospace kit... still got the Baer kit, in hopes that I might buy another Fox Mustang to make a street cruiser out of some day.
To make a long story short, brake upgrades are very much worth it in any circumstance IMO. If you've got the extra cash... otherwise, there are some great aftermarket disc pads/shoes that will make your stang stop better.
