i've done a few installs featuring wilson benesh, and my advice is save for the discoveries. the disco are just to die for. in my opinion they are much more than $2000 better than the arcs.
Wilson Benesch ARC vs. other Scanspeak revelators
I am very interested in purchasing a pair of the WB ARCs but was unsure whether they were significantly better than other monitors that use the scanspeak revelator for a much more reasonable price (i.e. Tyler accoustics, reference 3A MM De Capo, and Focus audio). I do realize that the WBs use a slightly modified version of the revelator, and they do have a more advanced cabinet design, but do these factors significantly increase sound quality over the tylers, focus, and the like? I feel like the only monitor that compete with the WB ARC in the $5k range is the star sound (harmonic precision) caravelle. Does anyone have any other suggestions in this price range?