MoFi Sourcepoint 8 or Q Acoustice Concept 50s

You need to listen to both speakers, not to see which is best but which one you prefer. Both speakers are designed by two of the best designers in the audio world today.

I like the Mofis but will stick with Ohm Walsh.   BE sure to check and get assurance of a delivery time these days with Ohm however, they are navigating a major change in ownership and mgmt over the last year or so and I read some reports of customers having issues that were never a problem prior.  Hopefully teh smoke clears.....still the best value for music lovers in my mind!.

coming from di-poles you should consider open baffles. best of both worlds as they say and you seem to have the room for them. 

I've been very happy with my Ohm 1000s in a decent size room (with a sub). While some are bothered by the image not being quite as precise as some other speakers, I find the sweet spot so incredibly big that, for me, it does a much better job of creating a perception of a live event when one is in different spots in the room. For example, I have a chair in front of the fireplace that is off-center to the right and back a bit. I enjoy the sound just as much there as I do when precisely centered and a bit closer. Of course, different people look for different things which is why opinions vary so much as to what is best.  So, lots of ideas in this thread, but you're going to have to decide for yourself. 

Extremely high impedance peaks like that can often be well addressed by a high value resistor in parallel with the inputs, by the way.  Of course, needs to have the watts!