Dude,
It's all in the combo. Suspension components need to work together. For a coilover setup to be effective, you need to have a matched spring and shock combo. If the shock does not have enough dampening to handle the spring stiffness, it will ride and handle like crap.
When a spring and shock combo is matched, the ride and handling a very good. Much better then a modified McPherson setup like the Fox body setup.
the reason a coilover rides better is because of the wheel weight properties. With a coilover you can have a softer spring than compared to the standard lowering spring, and achieve better handling and ride quality. I am no expert in this field, but look at Maximum Motorsports website for a better explanation.
But maybe before you swap combo's you can switch out shocks or springs and get a great handling/riding setup.
What brand us your coilover system?