hi new to groups

do i  need Shocks/Struts...?

i checked all 4  there not leaking at all. but it creaks? when
cold?especially the back

ride is firm , not bouncy at all, ran 80 mph earlier ( just to test it,
hehe) ,never floated

altough i feel the little bumps/imperfections on the road, sort of a
Thump , whenever i hit one.

i want a OEM feel....

which should i get? any recomendations.