The WP 7 are vastly better than the Sophia's so if you have a decent amp I would get the better speakers and then upgrade the amp later.
I would also strongly advise you to listen to a pair of Usher Be 20 loudspeakers which are 516,400.00 brand new and they will stomp on the WP 7 and 8.
The Usher uses a pure beryillium midrange and tweeter and also employs the famous 10 inch Eton bass drivers that Kharma uses.
This magnificent speaker is in the same class at the $40-$50,000.00 speakers such as Kharma or Marten but because they are from a company who believes in reasonable pricing cost so much less. I am in NJ if you are close contact me for an audition. Please check them out you will be amazed.
One of my customers bought a pair and his friend has the Avalon Eidilon Diamond and the Usher's smoked em!

