Hi SSL,
from what i know, a divan would be appropriate if you decide to build a wall feature behind the bed to act as a bedframe. However, if u are not, then a divan will look very plain and it'll be more appropriate to get a bedframe instead.
As for myself, i was also quite in a dilemma b/w these 2 but in the end, decided to choose a bed frame instead. U see, if u build a wall feature, and do not like it after a few yrs, it will cost quite a lot to change a new one. whereas, a bed frame does not cost as much or even if u don't like ur old bedframe, u can use it in ur spare room.
Also note that if u buy a divan, usually the mattress will feel softer than if u put it on a bedframe bcos the divan is cushioned. So if u want something firmer and using a divan, then make sure u get one grade firmer so that it'll feel just nice on ur bedframe.
Btw, have u considered other models like Felicity, Expedition instead? These models have a plush layer i.e. firm at the bottom but soft on top.
Ok, gd luck on ur mattress hunting
