Power Conditioning for a mid-fi system.

An economical approach is the Wireworld Electrafier AC power strip available from Cable Company (& also Audio Advisor I believe, they also have the PS Audio AC strip, & another model for around $200). The AC cord is detachable on these strips; the use of an upgrade AC cord input to the strip along with one of those plug-in Enacom filters can achieve fair amounts of filtering. However by the time you bought all of that stuff you could probably get a Chang Lightspeed model 2500 6-outlet conditioner for less $. This is a 15 amp capacity unit, so if you use larger power amps then either plug the amp directly to your line (using an upgrade AC outlet of course - at least a $25 Hubbel outlet) or use another conditioner of higher capacity such as the Chang 9900 amp, athough they do cost more.
Economical line conditioners from Monster & Panamax are often suggested for budget systems, but I can't recommend them based upon no experience with them & also based upon forums that I've read in that regard.

Great line conditioning (1800 watts) and six outlets with good filtering and surge protection to boot. Heavy as a brick (large autotransformer) but you can't do better for the $$.

About $130.00 USD (Do a Google price search).

I am not a big fan of the Monster/Panamax grade conditioners. They are fine for a stardard HT system, but I assume you want to do better.

The Chang Lightspeed are nice units. So are the ones by Audio Power and Vansevers. For a few $$$ more a Richard Gray Model 400 will really clean up not only the power, but any outlet on the same circuit near where the 400 is plugged in.

For just cleaning the power, I am a big fan of those $100 Blue Circle BC86 Noise Hounds. Two are even better.

Get dedicated lines first before you do all of this. They run about $100-$150 a line and get rid of all those cheap outlets on the power strips.