I recently acquired a Luxman M-700u amplifier and a CL-38uc preamplifier. While the M-700u does not possess the nth degree of control on the Wilson Sabrina like the Symphonic Line Kraft 250, it is sounding very good indeed. Maybe I will consider the 900u as a future upgrade. I also replaced the Kimber selects with Acoustic Revive solid core copper cables, feel that they are sounding better with the Sabrina.
I love your system. We know that the Harbeths are great speakers, and the Lamm pre is also well known, but not many people have been exposed to Symphonic Line amps. They are really among the best solid state I believe. Enjoy.