Should I Upgrade from an Edge G8 amp to the Edge NL-12 amp??

I have an Edge system now with an Edge G2 preamp and Edge G8 amp. I like it, it’s detailed & resolving, but just not in love with it. It doesn’t seem to have the punch in the speakers I thought the pair would produce. Maybe it’s cabling or source, or speakers. I was considering a power upgrade to the Edge NL-12 to improve on it. Any thoughts pro or con? Or could I do better going in a different direction. I'm open to all suggestions.

Thanks.

EDIT: This is for a secondary system in a 15x22’ room.