Audio research ref 160M vs ref 250SE

I’m looking to move to one of these two mono blocks (audio research ref 160m or ref 250se) 
I have not been able to hear both in the same room with the same speakers. And to be honest, I haven’t heard the ref 250se in almost 6 months. I will say that I heard the 160m and really enjoyed them.

i think the ref 250se are being closed out in that I see them available for almost half price new in the box with full warranty.

the 160m I would be buying used for just about the same price. The 160m is the way I am leaning. (And leaning pretty hard) But just wanted to see if anyone has a opinion about one. Or the other.

 I am getting a ref 6 Preamplifier.

The rest of my system is:
VPI Classic 3 with a sound Smith VPI zephyr CART
Aqua La Scala mk2 optologic DAC 
‘innous zenith mkiii streamer.
focal sopra 2
rel 3s or s3 subs x2
all Kubala-Sosna interconnects and speaker 
‘currently using a audio research gsi75 intergraded amp 

Any input would be appreciated. It will be one of these two sets that I will be purchasing and although I always appreciate other options, please keep this discussion to the two items listed.

thanks
biketony