You can flush mount with the ceiling, it will just require some plumbing , that's if the height is your only concern. Most valves are sold separately from the trim nowadays so be careful when buying online and calculating total price for the fixture.
Eg. https://www.amazon.ca/Pfister-VB8-310A- ... ower+valve
https://www.amazon.ca/Pfister-Serrano-1 ... hower+trim