I have them on a 50-watt Loxjie A30, a cheap Chinese Class-D amp. And they're plenty, plenty loud. The predecessor similar model is supposedly hard to drive. I don't think it's an issue with these at all. They'd be great.

Honestly, I have no idea why anyone ever needs more than 50+ watts. I have neighbors. I think watt-chasing is almost always a fetish & completely unnecessary, unless you're running a concert venue. You might need it for a subwoofer, but those are usually powered, so it's moot.