Sonus Faber vs Wilson

I haven't heard the Sonus Faber line in a couple of decades.  The ones I heard some time ago sounded really good to me.  However, I have been to my new favorite store in Atlanta three times this past year with my eye on a pair of Wilson speakers to replace my Thiel CS6's.  I dragged a case of records and CDs to the store a month ago and spent a day critically listening to the Alexia 2's.  They even put ARC preamps (phono too) in the room to more closely match my system at home.  I love the sound of these Wilsons.  I'm vacillating only because the Thiels come close lacking mainly the very clear strong bass of the Wilsons.  I was also waiting to buy until I installed a wood floor in my listening room.  Then two weeks ago I heard the new Vandersteen Model 7 XTRM speakers at the same store.  They sound fantastic.  Oh but the cost...

Hi James633- I actually have subs in my room.  I put them near the corners behind the main speakers.  After hearing the Wilson Alexia 2's for the first time, I came back and "tuned" the subs to the room better using what I heard at the store.  I phased the subs based on their relative position to the main speakers.  I did some math using 30 Hz as the reference point and came up with a phase angle of 29 degrees.  I think I'm more lucky than smart but after some experimenting, 29 degrees phase angle dialed into the subs seemed to be where the bass really popped.  I also have the subs roll off starting at 34 Hz so they do not interfere with the Thiels.  I don't think the subs are quite as fast as the Thiels but they do a great job supporting that last half octave down below 20 Hz.  And I do sit 10 feet from the speakers.  
Then, just recently I added a really expensive power conditioner to my system (the front end).  One advantage- the highs improved dramatically becoming so smooth now- even digital highs are creamy smooth now.  So that is my dilemma.  How much sound improvement will I really gain with such a large expenditure to acquire the Wilson's?  The clarity of the bass is still not quite there to match the Wilson's but it is close, real close.  I have one CD with some strong bass (Stanley Clarke) that I used as a reference.  One CD to make a large purchasing decision.
Hearing different outstanding systems is always a good thing, especially when It helps us to see where our own system's deficiencies lie.  I gained a lot of ground but I still am fighting that bug in me to get new speakers.

The subs integrated perfectly into my system.  I have to either turn them off or put my hand in front of the cones to tell if they are working.  And I agree with you that once you experience that last octave down to 20 Hz it is hard to give it up.  I have one song, a Choir song with a large bass drum.  When the bass drum is struck, the power of that drum is intoxicating.  The subs and the Thiels working together make moments like that possible.  But I wonder how it would sound on the Wilsons...