I did not have much success with the Bryston (4b-st) and the Magnepan 1.6 QR. The bass was ill defined and the midrange was lacking in dynamics, dull and dimensionless.
A much better match was with the Marsh A400 or BAT VK-200. Both of these amps gave the speakers life. An even better match was with the BAT VK-60. At only 60 watts this amp gave the midrange even more life and a tonal richness that can only be achieved with tubes. I've seen some listings for this amp at below 2K, which is an incredible bargain. I achieved the best sound with the VK-60 and a Placette passive preamp. The Placette can be replaced with any high quality passive (around $300 used) for less money if you do not need the remote control.