What class are you running in?
Do you have stainless steel brake lines yet? They will help a bit. imho, change your brake pads to hawk or something similar, and depending on which class your running in upgrade your rotors. These 3 things alone should mix the feel and performance up quite a bit.
A BBK will push you in to Street Mod. If your running a stock or a motor with the basic bolt ons, you'll most likely be kicking yourself later. When I'm X-ing the ZX3 it's very rare I feel a need for bigger brakes, if anything maybe enter the corner a little slower. Sounds silly but sometimes slower is faster since you can hold the proper line more accurate.
2001 Ford Focus ZX3 . 5speed . 105k+ . www.scca.com