The only way your going to get your results are if you workout your whole body. Verb is right, when you go to the beach (assuming you do) you dont want big shoulders on top of an unworked back. Big compound movements will get you the results you want with nice body all around. Squats, Deadlifts, and Bench Press should be your primary exercises add in other exercises if you choose, but remember don't put them before your compounds.