But for hobbiest applications, which is better?
There has been some pretty decent randomized research from Toole, Olive, etc. that both trained and untrained listeners have a preference for correct sound. It is something that nearly everybody enjoys more, even if they don't know why. In the sense that most people who like butter would enjoy high-quality, grass-fed butter more than they would enjoy the cheapest possible stuff, even if they didn't give a whit about where the butter came from.
For sound... as with any engineering challenge, it's always going to be a tug of war between desirable characteristics such as price, size, power consumption, sound quality, how loud it gets, etc.
Anyway.
If you're building some kind of portable boombox - I highly doubt the extra performance provided by ICEpower would be worth the premium.
If you're listening to something at home in a decent listening environment... then maybe it would be worth it. Even a quiet room is going to have a noise floor of like 40+ dB.
However, at the end of the day, the speakers themselves make the biggest difference.
I explicitly don't care how the non-linearity is corrected, just that it does.