Really? Exercise selection isnt important 
i didnt say that...if you want to train chest then pick a few movements that uses chest...bench, incline becnh, decline bench, db bench, db incline bench, db decline bench, flys, incline flys, decline flys, machine press, machine incline press, machine decline press, machien flys, cable cross overs from the top, cable crossovers from the bottom...etc etc etc...preferably one incline one decline and one flat..