Sonos Virgin / Multiroom Setup Help Needed.

[devs]

Hi guys, I'm about to convert my loft into an office to make room for a new arrival and its just struck me that now's the ideal time to introduce some ceiling speakers into the below rooms.

I've ordered a Sonos ZP90 and would initially like to serve two zones a bathroom and a Kitchen / Living Room. With a view to expanding to a total of 3 zones in the future.

My plan is to use 4 kef Ci160FR's (KEF Ci160.2FR Round Ceiling Speaker (Single))

Place 1 in the bathroom and 1 in the kitchen and 2 in the front room (open area)

Am I right in thinking that the ZP90 will be able to independently control 2 zones but if I wanted to introduce a further 2 I will need to purchase an extra ZP90?

Any thoughts or help would be greatly appreciated and I'm confused.

Cheers,

Devs