Part of buying the 1LE is for that factory tuned suspension. It's more then just the monotube shock valving & dampening in the FE6 shocks, the 1LE spring rates are different too.
Eibach's are great for style and stance, but im pretty certain they have softer spring rates then the stock 1LE springs have, which means sure, you're car will look better, but it might not handle as good.
Unless someone has proven otherwise on a 1LE? But I know it holds true on the 2010-2013 NON 1LE. The majority of the handling improvements from a Eibach equipped SS is from the Eibach swaybars to help limit and control the body roll.
-13.1 @ 109.7, 2.09 60' - BONE STOCK
-12.98 @ 110.6, 2.06 60' - K&N Intake & Muffler Deletes
-12.97 @ 112.4, 2.32 60' - 2" LT Headers w/ cats, CAI Intake, Magnaflow resonated X in place on stock X, Muffler Deletes
-12.68 @ 113.5, 2.01 60' - TSP 3" stainless catback w/ Tru-X, 305/35/18 MT ET Street Radial II's (no prep at the track)
-?.?? @ ???.??, ?.?? 60' - BTR Stage 4 Cam + Vortechc5@A2BMotorsport tune!