Bought a pair of Magnepan LRS. Should I buy a Schiit Vidar or Bryston 3B-ST?

Aerasonableman,
Don't get suckered into the game of high powered amps. Yes the Maggies do need a high current amp with sufficient power to drive them but just because you have a 100 watt amp does not disqualify them from playing the Maggies. It all depends on your amps power supply. I have Prima Luna Premium Dialogue HP amp rated at 85 watts per channel with KT 120 tubes. This amp has huge output transformers that control the bandwith, so it doesn't matter if you have 100 or 1,000 watts your only going to use probably 5 watts.

To echo what cavy said, maggies want high current capacity but would add wattage sufficient for the room size. When I had a 20x30 room, a modified Hafler DH200 (100W) was "sufficient" but a bigger amp would have been nice. Now in a 12x12 room I have 1W of class  driving the 1.7's "sufficiently", can't even use the Hafler, feels like its "shouting" at me even at normal volumes, looking at 25W class A amp to replace the Hafler.

Sorry that should have said 1W of class A above

I’ve been driving the LRS with a Vidar amp for a few months now and the amp has been excellent. If I really crank the volume the amp may go into protection mode but I have no desire for extreme volume. That’s not what maggies are for. As for sound quality a previous post here which stated that Bryston will "sound better" is nonsense.Vidar sq and Bryston sq are exactly the same. Correctly designed high-quality power amplifiers, when not overdriven, do not vary in sound quality.

I have a pair of Vidar amps that I tried to pair with LRS... if I run mono, 4 ohms is NOT STABLE.. AMPS WILL GET RED F-ING HOT  and stereo/1-amp is not enough to work any better than just OK   ..Amps go into protect if u push them for more than 1 hour in mono.  Just do urself a favor & get a higher end  Emotiva amp or a class-D that's good quality and w/ lots of current. My Yamaha 2 ch quite honestly receiver does a better job driving LRS vs Vidar and does not get too hot.. Very disappointing.  I have now owned several items from Schiit, all of which did not live up to hype/reviews IMHO. Decent build quality as far as form-factor goes, but that's about it.