Setting up MAINS filtering and such.

I have a Belkin pureAV and one transformer. I am considering getting another. https://www.newegg.com/belkin-pure-av-ap41300-12-power-conditioner-surge-protector/p/N82E16812120251


This is the PROPOSED method of filtering. The transformers, are plugged into the Belkin. Which are them used, to plug in the PREAMP, and DAC. 

I presume, that this makes the pre and dac SAFE, as they are protected by the Belkin. 

I presume, that 2 ampere, is sufficient for the dac, and one for the Pre. 


I presume, that the Belkin, AMP plugs, are unfiltered, as far as degradational filtering is concerned. 


All my music is digital now, so, I plug the computer into the wall. Should the computer have a filter? 


Should I skip plugging amps into the Belkin? 


Also, should I cease plugging in any wall warts, or lamps etc to the Belkin?