I never saw results from flat barbell bench press. It just destroyed my shoulders.
My chest really blew up what I switched to incline dumbbell presses. I also started doing a shit ton of pushups using the iron gym which is essentially a pushup/chins bar. It lets you get a much deeper stretch at the bottom than a regular push up. It Now I'm to the point where my chest is overpowering the rest of my physique. I've had to cut my chest workout down to nothing while I try to bring my back and shoulders up.
I would buy the iron gym before I started doing a bunch of flies.