Please don't associate watts with sound quality. In a 500 wpc amp, if the first watt is crappy, the remaining 499 watts will be crappy. I have a 40 watt tube integrated amp driving speakers rated at 92 sensitivity. I can blow the roof off with volume (not important to me). Most important: The sound quality takes me places my car can't.
The answer to the title of your post is: No!