In order of budget friendliness:
1. vacuum
2. hydroboost
3. remanufactured powermaster
I chose hydroboost for my car, but not for the advantage at the track. I just liked the pedal feel and performance when compared to the other options. Any of the three will work fine with #3 requiring the most care. If you care for the powermaster properly, it can last as long as the others.
Vacuum is an easy install that just requires a booster, master cylinder and a pedal from a vacuum brake equipped G-body (Monte SS, Regal, etc) Some people tee into the PCV line for a vacuum source, but you are better off getting the proper vacuum block with the extra port. Gbody parts a great kit that has everything you need.
Hydroboost is a touch more difficult since you have to run the pressure hoses to the pump and steering box, but you get to keep the PM pedal in the car. It offers great line pressure and a responsive brake pedal. There are pricey kits available, but most just source reman parts from here and there to put this together. If you watch Advance Auto's website, you can often get 30% off and free shipping. Mine was $250 going that route.
The Powermaster will drop right in, but you have to bleed the master cylinder and accumulator properly following a special
procedure. All three will require a complete brake system bleed.