I'm surprised no one mentioned weighted dips as an alternative to the bench.
sure we all love the big bench, but I think dips are harder--you don't have the back support like you do on the bench, so you are lifting your weight through the air. And if you do them with the right angle, you can rip up your chest and tris much more than on a bench press, IMO.
Plus, it is a chest/tri exericise on the vertical plane. How many chest exercises are there on a horizontal plane? These are a staple in my routines and always will be.