It depends

The WS6 package on mine included 1LE springs and a larger front and rear swaybar. I have since gone to Strano springs and Bilstein shocks and love it! With plans to do sway bars sometime.
I don't believe any lowering springs will give you the ride of stock springs. (I do think Strano's are the best in terms of ride height and not being too aggressive while still being aggressive

).
Any quality shocks should improve your ride of the junk factory deCarbons. The Bilsteins do pretty well with a stock spring. If you wanted to keep the stock spring go with those.
So - what I would do based on scenarios:
-Stock soft ride, stock height = replace shocks with Bilsteins and enjoy the ride

-Lower a bit, nice but aggressive ride, and I have $$$ = Strano springs and Koni adjustables
-Lower a bit, nice but aggressive ride, but I'm broke

= Strano springs and Bilsteins (the Bilsteins won't control all the spring, and will wear out faster than Koni's, but will do pretty good for a while)
Then if you do lower it, get some Lower Control Arm Relocation Brackets. And probably add Strano swaybars when you are ready for more aggressive turning.