Do you also want an in-wall solution for the sub? Or is free-standing good enough? Budget for receiver? Budget for sub?
ps yes, the speakers you describe can be used as 5.1 (altho most of us wouldn't put them in the ceilings except for Atmos), and if you had an avr capable of more channels you might turn the ceiling speakers to Atmos use some day and add speakers in the bed layer, i.e. lower/nearer ear height (altho that may not fit in with the aesthetic you're looking for).