I wouldn't sweat the power rating. My former Harman Kardon was only rated at 45 watts per, and it ate my Pioneer VSX-454 (100watts per) for breakfast. It had a far cleaner and more powerful sound.
Sometimes those numbers don't mean as much as we think they do. Heck, you're average tube amp is only cranking out 5-15 watts, and they have power to burn.
The only potential problem being the speakers you're looking at have a sensitivity rating of 86dB, which doesn't make them the most efficient. But, as long as you aren't looking to blow your neighbors out, it should be a fine set up.