Line conditioners: Tice or Chang?

Prices for a used Tice Elite 3/4 or Chang Lightspeed 6600/9600 are fairly similar. Both use a transformer-less design which I like for the sake of simplicity and lower overall noise (no hum). The finalist will be bought used, so auditioning isn't an option which makes your input all the more valuable. I'll gladly describe my system if anyone likes, but have done so often enough that it seems somehow redundant.