This is my first post, i am looking to up grade my speakers to either axiom M80 fronts,axiom VP150 center, axiom QS8 surrounds and an axiom EP500 sub or polk RTI A9 fronts,polk CSI A4 center, polk FXI A6 surrounds and a polk DSW 550 sub i am using a Yamaha RX-A2000 avr with 1 Emotiva XPA 2 fronts and 1 XPA 3 center and surrounds any input on these speakers would be appreciated thank you