if you want to continue to train your bench, the floor press would be a great choice. floor press will take the lats, and leg drive out of the lift. this will decrease you explosion, and force you to work the bench press differently. if you go this route, make sure you keep up with your lats. the lats are used to begin the generation of reversal strength, and then the majority of the lockout is from the tri's. but i wouldn't completely eliminate full range of motion, as this could lead to problems getting the weight off your chest. that is why i say if you go with floor presses, set up the lat work.
also, learn to pull the bar down with the lats. this will put you in a better position to press the weight, because your arms should be closer to the body (as opposed to flared out) and your back should be tighter. then explode up, and continue to push all the way through the lift with the tri's. by keeping the arms in more, you will take some of the strain off the pec tie in area (near the armpits.)
hopefully this will help you out. good luck bro. hope the pain goes away.