If you are looking for power, dynamics and control, it might be worth looking into the EC Nemo monoblocks. They put out 1,200 wpc at 4 ohms and can drive your Magicos very well. They are also black (with a thick, clear acrylic face plate).
Hegel H30 or Bryston 7B3 monos
Looking for system synergy and absolute control of my Magico S5 Mk1. Currently using a Vinnie Rossi Lio Preamp (avc tubestage) and Levinson 512 cd/Sacd player. The S5 seem to enjoy power and I want 3d sound with depth, wide soundstage and detail. Currently have Levinson 436 monoblocks that are very good-clean sound, but I bought it when I was using a Levinson 326s preamp which I no longer have and I lost some of the magic they had together. I like my Vinnie Rossi and have no plans of changing preamps. I know Hegel is used at audio shows with Magicos and Hegel uses Magicos in their listening room, but I prefer Monoblocks and the Brystons are less expensive at this time (and Canadian made, and 20 warranty, and 600w each). If I go the Hegel route I would have to buy one H30 now (use as stereo) and then save for a second H30. Any help?