Hello,
I just buy once and cry once. The 136 is the lowest I would go in the line. Later down the road try the Ultimate XX 20 amp power cable to replace the Classic cable which is still an excellent cable. The store I buy from lets you turn in your Puritan Classic power cable for the 15 amp version. I was so impressed I bought two 156 conditioners. That is how good they are. I am waiting for delivery of the XX power cord. One thing:
they need 10-12 days to fully break in. I call it the twelve days of Christmas. On the last day you get the best gift of all. Perfect sound. If you are near the Chicagoland area this store lets you try the Puritan before you buy.
https://holmaudio.com/They also have a new product called the Routemaster coming in a week according to them. It is a grounding station like other companies have except you can create a new ground for your system utilizing the product called the Ground Master. I have not done this yet but I will before summer is over. I am told you have not listened to this kind of black background.