I don't think the LaScalas are in the same league. The Klipsch can do loud and punchy but they will lack the finesse and 3D imaging of the Triangles. You will be very happy with the Triangles. Even better with a tube amp.
Perhaps you haven't heard the current generation of Klipsch speakers. They do the imaging trickery and finesse better than older klipsch offerings. The new Cornwall IV is extremely hard to beat in it's price range.
Oz