Flush wall and ceiling speakers

[CSK423]

I have an Onkyo HT-S5805 cinema system but want to change the front L, R and centre speakers to flush versions. The current ones are a bit bulky looking, with some decoration coming up it's worthwhile doing the work now.

As it's an atmos system the front L & R have speakers on the top for projecting sound upwards. Therefore I need....

Flush L
Flush R
Flush Centre

Flush ceiling L
Flush Ceiling R

I'm not up to speed with speaker spec etc. so based on the spec of the Onkyo speakers can anyone recommend what to buy. Budget is hundreds not thousands.