Best isolation cones

Wanting to purchase some new isolation cones for my amp and Oppo 105. See Nordost isolation cones however wondered if they are really worth the extra money or are there any alternatives? One of the things I don't like about Nordost cost is how high they make your unit sit. Also I have seen other isolation components like Vibrapods or Pangea audio Mega feet at a fraction of the price.

Advice please

Thanks