Audio Aero vs DeHavilland vs Atma-Sphere

I want to use either an Audio Aero Prestige Monos or the DeHavilland GM-70 Monos or an Atma-Sphere M-60 Monos to power ribbon mids and tweeter. Any thoughts or preferences as to which would be best? The woofers will be powered by a pair of Parasound Halo JC-1 monoblocks.
If you plan on using the Atma-Sphere's with speakers of less than 8 ohms, you might consider using a Spelz Zero Autoformer. Check with Ralph Karsten in this regard at