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.
2012 Camaro 2SS/RS - LS3/TR6060: BTR Stage 4 Cam, 2" Long Tubes, TSP 3" Catback, SLP 25% UDP, CAI Intake, ADM Air Scoop + Washer Relocation, Arun Tuned - 475rwhp 443rwtq