Question re: Power conditioner

I went back to the store this AM and found I had just missed the Monster 7000. I think it went for about $400. BUT, I did get an AC line analyzer that plugs into the wall socket and allows you to listen for noise and check EMI. (scored this for $20 ;-) This was a revelation. I found a line I had run for the amp from a grounded socket was full of radio noise and junk and I am better off to plug into a different socket that is relatively much cleaner. I also found a line I had been running some front end off to be filled with noise and garbage. It sounded like a trashy AM radio it was so bad. So, I am thinking I will run the amp off the wall socket and get possibly a conditioner or something to clean up the front end. BTW, switching the amp socket made quite a difference, especially in the bass, but 'more better' across the spectrum. Now, to find a decent unit for the front end...