Primare i21 vs. Yamaha A-S2000


I'm currently using Totem Model 1 Signature speakers + Primare i21 amp + Rega Apollo CDP.
I'm thinking about replacing the amp with Yamaha A-S2000 while keeping the speakers and the CDP. However, I'm not really sure if replacing the amp will improve sound quality or not.
What do you guys think?
henryjudy