It really depends on what your goals are. If you want balanced strength, you should let your tri's catch up to your chest. Make sure you don't take it easy on your chest, but do more for your tri's. Add in the dips, close grip bench (in addition to regular grip), and some skullcrushers. The only effective way to hit the long head of your tri's is if you have your arms extended over your head, such as with skullcrushers, or overhead tri-extensions.
However, if your goal is to specifically get a better chest workout, throw in some DB flyes or cable crossovers. I'm not a fan of isolation exercises, but they'd work for strengthening your chest. What are your goals, specifically?