How many power i need???

i would like to know if someone know how many watt i need to drive lound and effortlessly my speakers ( I have a large room (26 x 17 feets whit high top). I project to use moon or yba amp.

thank you in advance for you opinion
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1-Canton speakers are NOT very efficient. At 88.5 db for their best speakers(approximately) you will need a lot of power for a room that size. I would guess at 200 wpc minimum.

2-I hope you are not trying to fill that big of a room with the tiny little cinema series. They won't cut it.
Which model of Canton speakers?
Define Loud ? ...90 db? 95 db + ..?