The UMI K-members are vastly stiffer than stock as well as being a substantial weight savings. This means a decrease in cowl shake and a massive improvement in handling.
The K-member is a great mod if you have the coin for it. Personally, I would take care of the rear suspension first since that is lacking a lot more than the front design on 3rd/4th gens.
I have a UMI Chassis Mount Torque Arm(Chromoly of course
) and the difference is night and day from stock on the gas, on teh brakes, and especially playing around from the center off of corners
-Tim