I haven't heard the Master Reference but currently own a Maximum Solution, which others call the little brother of the Master Reference. It has the same 3-motor setup and APG, but only has 2 plinths.
My choices at that time, in addition to the Max Solution, were the Basis Debut, VPI HRX and the SME 20. Overall, I liked the Max Solution AMG most (sound and aesthetics). Current analog setup includes Graham arm, ZYX cart., Steelhead phonostage, and the table sits on a SRA Ohio isolation base.
I would have wanted the Master TQ arm but setup is quite a challenge so I opted for a more user-friendly arm. I'm currently looking to add a second arm -- probably a Dynavector 507/XV1s combo.
BTW, the Outer Limit ring does make a significant improvement in sound. Is the unit you're looking at an AMG wood, AMG acrylic, or pure acrylic?
Hope this helps. Good luck.