Road force balancing and on the car balancing is a total crock and waste of money for these type cars. It would be different if you had a Lambo or some other high end exotic. That's what that type balancing is for. You asked for the best type balancing. The best type is what suits the car at hand and in your case, a good computerized spin dynamic or static is all you need.
A good tire guy can spin them up and recognize problems that need to be addressed such as breaking tires down and turning them on the wheels like I talked about earlier. If a tire spins up on the balancer and the wheel is perfect and the tire runs perfectly with it, you could probably stick it on the car without being balanced and never feel a thing.
It's when you get cars with sensitive suspensions, very low profile sidewalls and very wide wheel widths that can pose some problems. If you're just dying to throw money at something, by all means, go for the road force stuff.
IMO, you don't and never will need it. It's tire balancing for GOD'S SAKE. It's not even worth one page of discussion. Seriously.