Rogue Audio Cronus ...what speakers do you love ?

possibly the best buy in all of audiophile land.  
i enjoyed my CMII immensely with Harbeth C7ES3 speakers.  
Tube upgraded to amperx 12AX7 and AU7, RCA 5914 12AU7 back row.  

I have "upgraded" everything but should have stopped with that system.  

I am always curious when I read about the CM. I have only heard it once for about an hour at Overture Audio in DE. I thought it was a nice sounding SS amp...problem is its tubes!. I did not get any "tube magic" from it...certainly unlike the MC275 I heard in the same place. Problem is the 275 needs a preamp and the numbers get much higher very quickly. I dont recall what speakers they were playing through as this was a couple of Decembers ago. I would be curious as to what/if any members have used either of these amps with Ohm Walsh or Kef R300 or LS50 speakers and if so their thoughts. I am VERY TUBE CURIOUS and will be upgrading my amp(s) in the next year but have been happy with my speakers. Now, thinking maybe its time to upgrade both...
BTW, running alternatively a Terry DeWick upgraded MC250 with an upgraded Acurus RL11 or a Marantz PM8005. The 250 has a wonderful blend of musicality and detail in its upgraded form but not enough power and the pre has no remote...and I have a increasingly bad back. 

In response to the prior post regarding Ohms... I purchased my CMIII earlier this year when I was running LS50’s.  Sounded great but small ... Stumbled across the threads about Ohms and had always wanted to given them a try. Next thing I know I found a set of Walsh 4’s on marketplace and they sound amazing with the Rogue. People say that Ohms aren’t great with tubes but maybe they just didn’t have enough power.  
I now have the 4.3000 upgrade on order and looking forward to how it will sound vs the 30 year old drivers that badly need refurbishment. Will report back after the upgrade.