Hard to understand what you are asking. You say you have KYB shocks now, but the shocks haven't been changed, meaning they are old? If you have old worn out shocks, newer monotube gas shocks like KYB's will certainly help.
Air shocks should be avoided if you are after "smooth" or "good handling" as they will provide neither. If you want your car to look like a stinkbug in heat, they are a cheap way to stick the *** end way up in the air.
If your car wanders, bounces all over the place, and it leans like a sailboat in a hurricane, I would start by rebuilding the front suspension and adding a front sway bar with good matching shocks all around.