Q. on cheap good line contioning

Get rid of the computer filter that you have, it restricts power quite a bit.

Go with the Tripp Lite or something along those lines. I use a VansEvers Super Companion ($150).

Regards,

Dedicated lines to the breaker box might be the best bet. Monster HTS2000 et al would be about the cheapest thing that works. Although at the various places that I've lived my VansEvers power conditioner has worked better than a Monster HTS2000 albeit at a higher cost. Any of the things I've recommended is better than nothing.

Be careful of the Monster HTS2000. It will sound better at first, then you'll realize that all your CD's LP's sound the same. It actually glosses over the detail.

The Chang Lightspeed is about the least expensive audio conditioner/surge protector that helps the sound that I've tried and doesn't hurt it. I still plug my amp into the wall. The Chang 6400 is too limiting.

I'd avoid triplite and all the other computer power strips. They are not made for audio, so they will degrade the sound.