From your description of your audition I would guess that the Expolinears are voiced differently from Wilsons and may not produce bass the way that Wilsons do? You might want to try a few different amplifiers with the Expolinears to get more of a sense of their tonal balance, and from there try to project to your Sophias. If you find the Plinius combo to produce the most bass weight and slam with the dealer's speakers, they should do the same with yours.
But yes, still a risk to buy and pray. The price though is low enough that if they didn't work out, you could probably sell them here and come out even or pretty close. And I have heard that Plinius is more widely known in Europe than in the U.S., and is widely understood to mate well with Dynaudio speakers. So at least you'd have a strong used market if you wanted to keep looking after getting them home.
Decisions, decisions...let us know how it works out.
But yes, still a risk to buy and pray. The price though is low enough that if they didn't work out, you could probably sell them here and come out even or pretty close. And I have heard that Plinius is more widely known in Europe than in the U.S., and is widely understood to mate well with Dynaudio speakers. So at least you'd have a strong used market if you wanted to keep looking after getting them home.
Decisions, decisions...let us know how it works out.