I am set on replacing the factory Billlies on my 2012 TRD Sport with 5100s. Will I notice a significant difference between a a preassembled coil over (with Eibach springs from Toytec) and using the factory springs. Replacing the shocks only and setting the front at like 1.75 to improve stance will cost 1/2 the price of a coil over package. I'm just worried that the ride will end up harsh. Will there be a noticeable difference?