Power conditioners usually dont have a very high surge rating. What they are generally used for is removing harmonic resonance from line power and stabilize the voltage being supplied to sensitive electronics.
When I used to do a lot of DJ or sound engineering type of work I would always have everything that wasnt an amplifier or a high intensity light plugged into a power conditioner. At home could be used for stereo equipment or low power electronics. I wouldn't bother with connecting a high end PC to it as the PSU does a good job of cleaning up the power supplied to the VRM system, and a UPS would be a better choice.
Generally you also dont want any kind of inductive load attached to a conditioner as it will probably burn it out.