I am looking for some advice regarding my HT setup.

I currently have a 3 channel configuration: Axiom M22ti (L/R), PSB Image 8c (center), and PSB SubSonic 5i (sub). My receiver is a Yamaha RX-V540 (80W x 6).

I am satisfied with the sound during both music and movie playback, however, I feel there should be more warmth or robustness.

Would an amplifier help in this instance? If so, any recommendations....?