If you look at the latest issue of Stereophile (July 2010) in the technical part of the review, you will see the impedance curve. It's below 4 ohms through most part of the lower midrange/upper bass and there is an amplifier unfriendly combination of 3 ohms/-43 deg phase angle at 61 Hz. So the amp must be rated for 4 ohms and even 2 ohms. But given the seriousness of design and build of Rowland gear, I would be surprised the 8T could not drive the Wilsons. Can't you have a few day in home trial to make sure they work? Good luck!
