belltech adjustable drop struts by far are the best riding.
the stock ssr shocks with drop springs ride good at first but start to kill the shocks fast because the stock shocks in front were not made to be lowered on the shaft goes so far into the shock its out of its effective range.
keep stock springs and use the belltech drop struts and you will be set. done many like this no probs and much better ride than doing any aftermarket drop spring. In rear belltech drop spring with the belltech street performance shocks and your done.
Also you ca do rear djm 4 inch drop springs (will drop 3 inches on a ssr) and ride is very good but will require new rear shocks due to spring length and how much lower the truck sits.
Also in front there are kbee coilovers which people have used here and replaces the entire front strut completly.
you also have belltech double adjustable coilovers that replace the shock in front/spring but you just use stock top hat section which kbees you dont.