I'm pretty excited to see what becomes of the ARX-160. I think its a gutsy move from Beretta to release another gun into the market to compete with the kings of the type, the AR and AK. I don't think the Scar or ACR lived up to the hype.
Have you tried out the Sig 556? I hear they ironed out any issues they had with it. It looks like a modernized/refined AK to me. Something an AK guy could get familiar with very quickly.