Mgguy,
I have a very similar system. Wilson Sophia I's, Audio research Ref 3 Pre/ Ref CD7/ and Audio Research VM220 Mono Blocks. If the sophias are not set up exactly correctly, they will sound hard in the upper mids/lower highs.
When positioned correctly in the room and have the proper toe-in, they will produce a much smoother fequency response. If your Sophias are new to you, work on set up over and over. Try toe in so they are aimed directly at you, withought either side visible from the listening position, spaced relatively widely apart. There are specific set up parameters that need to be observed to achieve smooth frequency response. The results are worth the effort.