Need in-ceiling speakers for a kitchen, master bedroom, master bath, and study

Kitchen area is biggest since it includes the breakfast area and what is called a "keeping room", which is sort of a small family room adjoining the kitchen. Rest are typical sizes.

Looking for in-ceiling speakers that are good value: decent performance at a good price. Home theater will have separate, dedicated speakers, so we're talking for whole house audo application only.

Any model suggestions and/or recommended online retailers, etc., appreciated.