A smith machine is not necessarily a bad option for benching. For instance, the dual progression causes lateral variable resistance working your stabilizers sufficiently. However, I have found out going from a smith machine to traditional bench you do loose explosion, to sum degree. So a great lift for smith machines is called "Smith machine throw". In this lift you want to use about 50% of your 1RM. You want to control the weight slowly down (eccentric) totally about four seconds, as for the way up (concentric) you want to literally explode so hard off your chest with a open thumb grip throwing the bar as high as it can go, then catching it on the way down. If by reading this description is hard, YouTube has good videos of this lift. Note, this lift will increase muscle neurons to fire more faster and more rapidly resulting in a more explosive reps. Good luck.