125watts a channel wouldn't be to much for fa 100w speaker. I would believe that you would be fine, but that is completely up to the manf on how they publish the specs of their units. I recently picked up an Onkyo 805 that can output a 150watts a channel at clipping. Obviously anyone would be dumb to attempt to drive their speakers that hard, but getting beyond the 120watts at .01% THD is only 5watts below the recommended power rating of my rears. It wouldn't be that hard to go beyond that point. I contacted polk audio about this and they said their published wattage ratings are conservative but within reason for the average consumer. It's also an insuraunce factor for warranty ect. He said I could prob drive my Monitor 40s to about 140watts max before I could have the potential to ruin them. The monitor 40s are rated to 125watts. Case and point. You're more likely to damage a speaker with an underpowered amp that one that delivers clean power at a higher wattage rating with a low THD.
REMEMBER: with an upa7, will you ever drive your speakers that hard. One believes me that that power rating is at 1%THD which is clipping.
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