IMO, i gain in the lower chest a little from flat bench, not from incline, but decline flies and sitting flies are doing it for me. I usually work out alone, so i prefer not to do decline alnoe because i am short and the bar is behind me quite a bit. I just cant get used to decline on smith machine. Everyone is different . I know people who do nothing decline and have a solid chest all around. I stay away from cables until i bulk more.