by "shoulder press" I assume you mean the standing barbell "press". First figure out why you don't like it - typical answers are "it hurts" or "I can't lift as much weight" or "I want to work my chest more than shoulders."
The Press has huge carryover to the bench press. The Press is an awesome movement and when done correctly can drastically improve shoulder strength and stability.
I suggest improving your Press, not replacing it.