These were the few power line conditioners we managed to lay our hands on in 2011. While I had tested the Torus Power RM 8A AVR sometime in 2010, I didn’t felt that the improvements in sonic qualities to be tangible enough for me to up grade. 
However something changed in the power supply grid in my area since and the Torus made a comeback!
Torus Power RM 8A AVR is the best all in one power solution for me.
Torus Power RM 8A AVR
It’s the ultimate all in one box power supply solution, for people residing in areas where their power supply lines are not only soiled with EMI/RFI interference, but also huge voltage swings. While EMI/RFI interference is generally agreed by consensus to degrade sound quality of a given hifi system, voltage swings can shortened lifespan of all electronics.
Personally, I do feel that it’s a factor that does effect a given system’s sonic signature too. Too low a supply voltage (below230V) and the sound gets all mushy, lethargic, and a general lack of drive in the music.
Too high the supply voltage (above 250V) and the sounds turns harsh, with tizzy highs and vocals sing like as if they’re screaming at you! Usually accompanied with a strong, dense white hash in the quiet musical passages, which mask away low level details. I am a happy Torus Power user, enuff said.