Please don't try to describe quality in terms of quantity, they are two completely different things.
30 watts is much larger than a 3 watt amp some folks love, and 1200 watts is is just as large in the other direction as compared to a 130 watt amp. But neither extreme describes the accuracy or quality they produce. Just because one is small or large doesn't describe how well it performs. You just are making assumptions. Does a 300 hp engine coming in the form a super charged 4 cylinder 2 liter engine capable of the same performance as a large 9 liter 6 cylinder diesel engine in a 40,000 lb bus. Of course not.
Lets say a 30 watt amp has 90 db signal to noise and .1 % distortion. How quiet would 300 watt amp be to equal the smaller amp. It would have to be rated at 100 db. In addition to costing more to create 300 watts it will cost significantly more to gain those extra 10 db of quietness. Lets say you are using 1 watt driving Klipsch speakers which is concert level. and your 300 watt amp is driving a Bose 901. Well 300 watts won't be enough and the distortion will be much higher. So what have you gained, nothing you have lost. The 30 watt amp has over 14 db of extra power left for peaks. You would need al most 8000 watts to create the same level from your Bose speaker. How does that work for you.
I don't attend to offend, but quantity has never described quality. Just because one blonde person weighs 110 lbs and another weighs 110 lbs makes them almost identical in every other respect. One could be beautiful and female, the other ugly and male.
Never assume power is the ultimate answer. Its not.