Power Conditioner

Folks,I have been doing some reading on power conditioners, since I have decided to get one in my system. But after reading the reviews and user forums, I am a bit unsure if a power conditioner will really improve my system, because of the following 2 reasons:
1. I have 2 dedicated 20Amp lines from the breaker box to my listening room. The distance of the power cables from the breaker to my room is, at the max, 35-40 feet. One is used for plugging the power amp directly. The other has a Brickwall surge protector into which I have plugged the rest of the components including the preamp.
2. I live in North East Ohio where there are not too many industries so I am assuming the power should not be as dirty as some of the folks living in big cities or apartments, get. At the same time I think we do not get much "voltage fluctuation".
What are your thoughts of the effectiveness of a power conditioner in a situation like mine? Anyone having a dedicated line saw improvements with a power conditioner?

I use the Isotek Evo Aquarius conditioner.  I plug both Canary monoblock tube preamps into it as well as my other equipment except for the transport and dac which run off battery power.  It is in no way current limiting to my ears.  The system sounds pristine with exceptional clarity and has great dynamics.  I just picked this conditioner up on Audiogon and could not be more pleased.  

Hello, Can anyone tell me what it means a green dot and/or triangle on a power conditioner outlet?

Thank you.

I've gone from a Running Springs Haley, Core Power 1200 Audioquest 1200, and now Puritan 156. Been happy with all of them.

I am pleased with my Equitech 2Q