Chetiar - all Avalons I have tried (maybe with the exception of Isis) have somehow limited dynamic impact in my expirience. Even the Eidolons, which use 11" Eton bass driver.
Wilsons, on the other hand, have been known for years for great dynamics and bass impact. And Sophia II is no exception.
The problem I always had with Wilson speakers, was that they were too bright and fatiguing for my taste. But not any more. Sophia II - for whatever reason - is a major breakthrough from the typical Wilson "family sound". Properly burned in (read: after 400h), they are not bright or edgy AT ALL. Sophia II sounds very natural and well balanced through out the spectrum, fast, uncoloured, and with one of the most grainless high frequencies.
One of the Sophia's strenghts - and the do that better than almost any speaker I have tried - is the power and articulation they are able to provide in the vital lower midrange. If you love classical music as much as I do, you would love the way Sophia can reproduce the left hand of the piano, the baritone chest-tone or the chello. Most other speakers sound boomy and muddy in this region compared to Wilsons.