Best Atma-Sphere M60 or VTL MB175/250

for driving the SoundLab Dynastat speakers?
Perhaps the impedance of these hybrid speakers
(8 ohm declared) is not enough good for OTLs,
but the Atma-Sphere is a very good amp. VTL very
muscolar, better with signature transformer.
I look for a transparent and dynamic sound,
with good bass control. Actually my amp is a
Sonic Frontiers Power 1 in a relatively small room.
Thank you for any suggestion!
Best regards to all,
Massimo