The way I see it your question has two parts: surge protection & power conditioning. For maximum surge protection, look at the Brickwall products (and similar). Unfortunately, series surge suppression, by itself, doesn't do much in the area of power conditioning (in my opinion). However, their are small capacitance units produced which seem to address the problem of noise. Some production units are Quietlines by Audio Prism, the AC Enacom by Enacom & a unit by Rubicon Technoligies. Read Recommended Audio System "Twaeks" at http://www.magnan.com/column.shtml and article on "AC Line Conditioners: Friend of Foe" at Soundstage by Pete Goodreau. Paying in smaller increments makes more sense for budget challenged audiophiles like myself or pay all at once for a more expensive unit (like those made by Audio Power).
