The Master 9 is a really good amp. IMO the transparency, base, dynamic, resolution, soundstage, treble etc. is very good. I haven’t heard the GS-X mk2, Ragnarok and Auralic Taurus mk2, but think that they probably are equally good.
The nice thing with the 9 is that it match with many different cans/speakers, have a very nice sound if pared with a transparent and dynamic sounding dac, good built quality, it has many ins and outs, lots of power and it has a good volume control and a remote. The negatives is that its big, gets warm and can sound a bit thick if pared with a too warm/slow/full sounded dac/can/cables. This last sentence is important if planning to match with LCD3.