No div is also not what I want. Div makes a (logical) box around everything inside. So partly (for example at navigation bars) it would be better than a ful break with br but in general this is not what you need.
You don't want to embedd a paragraph of text into a div. You just somtimes want to separate contents at one line before - after and not before - middle - after.
A logical box is exactly want you want to mark a chapter. I can't see a logical reason to have a break inbetween 2 items rather than a box around each.