I've been looking at my options for mattresses and I'm thinking about get one that is 7.5 inches thick and medium firnmess (ILD of 32 and 4.4 lbs density)

I am 5'4 and about 120-125 lbs. I like a pretty hard surface to sleep on since I am used to sleeping on a folded comforter over a hardwood floor (which is slightly too hard sometimes). Could anyone around this weight and who likes hard beds speculate if I would like this bed? Or anyone else who might know? THanks.