I would say try the cheapest solution first, making sure you can return it. I might ruffle a few feathers, but I personally don't see what a lot of these "high end" power filters do. (I do understand that people who have the money to spend that can "hear" the difference - real or immagined - that is great, I am all for everyone being happy with their own system.) The surgeX devices are designed to help filter that exact type of hum.