SME Vs Origin Live

I'm currently using an upgraded Onyx including KLEI Harmony connectors with my Roksan Xerxes 20plus & considering a tonearm upgrade. 
I've been looking at the Encounter & Illustrious but also interested in the SME M2-9R...

Are there any M2-9R users & what are your thoughts about this arm & how does it compare to your previous tonearm? 

Thanks.