What's the best suspension for Street Handling?

What are your guys opinions on Leaf spring sliders on a street car for handling? Like this:


No big gains. We tried running those in our circle track cars (1/2 pavement). They actually would get tire rubber in them and bind/drag the suspension movement. One of the reason we like them was that we could shim them to get scale numbers. Something you're not going to do with a street car.

Again, they will transmit a lot more road vibration and harshness than a poly bushed hanger.