Avoid Monster. It makes the sound worse IMHO and others. The Chang Lightspeed works for me and actually helps the sound a bit without any negative results.
I guess that is my big question. Would it just be in my best interest to avoid all of this in the first place and run a dedicated circuit? Do these devices really effect the sound that much? It wouldn't take me but a half a day to run the circuit. But I was thinking that there could be some benefit from using such a device. If they all effect the sound somehow, there might be one with a positive effect and provide the needed safety needed.
Run the dedicated line(s) and then see if you need to add anything. I experienced much improvement in the sound after doing so in our 100year+ old house. After all, conditioners are only needed to correct something on the AC.
BTW, while you are at it, make sure you have or put in a whole-house surge/lightning protector.
I achieved dedicated lines, power conditioning and the answer to my electrical distibution nightmares, which had persisted for many, many years, through a single product. It requires a 240v outlet in your home, but believe me, this was one exciting purchase -- to realize that it instantly banished a whole host of intractable issues and maximized my sonic experience with all the rest of my gear (which had been mysteriously underperforming forever)! -- I was elated. Unfortunately I sold off alot of good stuff before discovering that I had had the right stuff, just wasn't feeding it properly. If you don't have the outlet it won't help you, plus I'm in a hurry, but if it interests you to any greater extent you can contact me through Audiogon.
I agree wholeheartedly with installing dedicated lines. Get some (enough for your wiring needs) 10 gauge Romex from Home Depot, send it off to Cryogenics International to have it cryoed. Also get some Porterport receptacles and then have your favorite electrician wire you up.
For a line conditioner, you can get a BMI IPLC that is a passive line conditioner that is incredible for the money. You should be able to pick one up used or a new one from BMI. Just do a search for BMI and you will a used one up for sale for $ 535.00. He is asking too much but you can contact BMI and see what a new one would cost.
I am guessing you can possibly get 2 or 3 dedicated lines (depending on how long the runs and how complicated the wiring is) and a BMI IPLC for around $ 1,000.00.
If you are interested and need help, email me off line.