Ohms and watts are pretty meaningless stats to the average speaker shopper. I don't know why they even mention it.
Ohms measures the resistance of the speaker to power. It is a highly technical and complicated measurement that you really don't need to worry about
Total power handling is a little more useful and simply states the total power a speaker can handle before blowing itself up. This is not a measure of how much power it takes to run it. Just how much power it would take to blow it up. You can pretty much ignore this also.
Total power of the amp simply means how much power it can drive without blowing up. Also a pretty irrelevant number for most speaker shoppers unless it is really low.
A speaker will only use whatever power you send it. For example, if you set your volume at 1/3 rotation on the dial you may be sending the speaker 1W of power. The amp is sending the speaker 1W, and your speaker is using 1W. With a speaker sensitivity of 90db/w, your speaker will play at 90db. 90db is a pretty loud volume. One that your wife will likely start to complain at. So, you will never really need to worry about total power and ohms.
Pick the speaker that sounds good to you, fits your room and decor, and listen to it critically before buying. Then you will be all set.