Use the cheap ones for cell phone chargers, and the better constructed ones for your audio components. Make sure you run them in for a full day or so with a fan, TV or other appliance, then do several listening tests. The power conditioner may sound good with some components but not others. Verify for yourself. You may very well end up with one brand for the source components and another for the amps or subwoofer.
If you use a surge suppressor, plug that in closest to the breaker panel, if possible.
If you use a surge suppressor, plug that in closest to the breaker panel, if possible.