FYI,

The Eibach pro kit springs are softer than the OEM. They are close to equalling the Crossfire Limited models which are near 50% softer than the SRT's.
Also, to do any suspension modifications properly you must look at the whole geometry of the suspension as well. Camber and castor adjustments are manditory.
There is a very good reason why most suspension modifications worsen the cars handling and most of them stem from doing things half assed.
Manufacturers spend hundreds of hours of R&D to make their cars perform at the highest levels. To think that a inexpensive after market part can make things better than the original is truly wishfull thinking.
If looks are the only thing that you are interested in then yes, lower your car. But if superior handling is what you are after then you either keep the original set up or you go to a professional road race shop and have them do the modifications.
With this level of car, driving enjoyment should be your first priority.
Good luck.