hi!
I have a pair of mono extreme and I can say they drive my harbeth SLH5 very well. But I would really not trust anyone's opinion unless you have heard the set up yourself as its so so dependent on the set up, individual taste etc.
i would say look for a dealer who can do a home demo for you. In terms of reviews the two are very well reviewed, so I would say go for the one who can get the demo in your home, if you are happy with the sound.
same for the speakers. its a lot of money, and its worth getting them to demo it, even if you have to strong arm them.

And besides, how can you expect a realistically unbiased opinion on a board of owners of the odysessy gear.
No offence to all on this board, but just advising best way to get a neutral.. voice . haha.
Nam
Singapore.