tomer_tsin
Either will do, and with your speakers being 91db.
You only need >100w into 8ohms to make them, work (more the merrier), and they're not too seriously hard to drive either, I would suggest the better sounding XA versions of the Pass stable, for the extra class-A they give and better sound.
"Stereophile: Its impedance (fig.1) is moderately difficult, with a minimum value of 3.1 ohms at 120Hz and a demanding combination of 4 ohms and a 42 degrees capacitive phase angle at 80Hz"
.https://www.stereophile.com/images/archivesart/DynTemfig1.jpg
Cheers George