The improvement to CD's was more profound, making them sound more analog and pure, removing that last bit of elusive to describe 'digititus', especially in the high frequencies; again, cymbals sounded more like cymbals. Everything was more liquid, more transparent, more like music from top to bottom. More detail but without the fatigue. I could go on but I'm starting to sound like one of those audiophile magazine reviewers (which I read all the time!)
The bottom line is if you've invested substantial time and resources into your system you owe yourself the protection that these units afford. The cost of the Surgex isn't cheap but not much compared the the price of replacing all your gear, some of which may not be replaceable. But with the improvement to the sound, having the best surge protection technology in the world is just the icing on the cake! You cannot buy these units retail at the Best Buy, you'll have to go to the website and find out who your local rep is and order one from them, but it is mandatory!