Lowering springs do affect ride comfort, yes. Most lowering springs use a stiffer spring rating.
My suggestion is to install aftermarket shocks & struts, at the same time you install the springs, if you want to maintain maximum comfort. The aftermarket shocks will help dampen the new and stiffer spring rating.
I would make sure you do two things...
[ol][*]Go with a lowering spring which has a soft, progressive spring rating... such as the
Eibach Pro-Kit for example. This way you'll make sure that comfort is still maintained.[*]Purchase a good set of aftermarket shocks & struts to match up with the springs. Such as the
Tokico HP Shocks & Struts. These will help dampen the movement.[/ol]
Let me know if you have any more questions!