Doodle... I have an ARC 100.2 ss amp driving 802 Matrix IIIs. Definitely go with a ss amp for the B&Ws to get the most out of them, but I strongly recommend a tubed preamp based on extensive auditioning. I have heard Nautilus 802s with a similar combination (Conrad Johnson pre) and the sound was great. I would get the best electronics you can on the used market if necessary to match with your speakers, I agree that the Rotel probably won't bring out the best in your speakers.
