Magnepan, Ohm, Spatial or ??

That amp should do quite well with either I would expect.   For me getting the right speakers to fit the room is job 1, then amp match job 2.   
The thing the Ohms do uniquely is the very large sweet area.   They will do soundstage  and imaging coherently throughout the room with most any decent placement.  Spatial will be tougher placement I expect. Both sound great when set up well. 

@mapman 

It would be great to demo both of them.  I talked to John at Ohm.  4-5 months for delivery!  Not sure how behind Spatial is...

@soundchaserh
They are ISO-Acoustics’s Gaias and they are an amazing upgrade. The M3’s perform fantastically with any music IMO.

Wow 4-5 months is long for Ohm.  Pandemic I suppose.  Glad business is good.
Ohm usually closes most of July and runs sales prior ie around now. So now is usually a good time to buy ( I did) but this year might be different.

That was it - pandemic.  He said they're working 7 days a week, 10 hour days.