Take a look at other similar sensitivity loudspeakers, Let's open this month's Stereophile.....
B&W 802D3 - 90dB sensitivity, 8 ohms, Recommended amplification = 50 -500w into 8 ohms. Notice that while there may be a sweet spot, there is also a "minimum". And that's for a full range speaker.
Now your ad copy didn't say 100 watts "ideal" or "recommended", it says "minimum". Do you see the difference? Do you see why I thought you might want to re-think that?