Axiom Home Page Forums General Discussion Advice from Axiom Owners Which is easier to drive?

I have a Denon 3805 and was wondering which speakers would be easier to drive?
Axiom:
M60ti at 8 ohms, 93dB, 250 max watts
VP150 at 6 ohms, 95dB, 400 max watts
QS8 at 6 ohms, 95dB, 400 max watts

Polk:
RTi8 at 8 ohms, 90dB, 250 max watts
CSi5 at 8 ohms, 90dB, 200 max watts
FXi3 at 8 ohms, 88dB, 150 max watts

I know that Polks are power hungry and the Axioms are efficient, but 3 of the 5 Axioms are 6 ohms and need a lot of watts. I've read that the Denon's are not too stable below 8 ohms. The Polks are all 8 ohms, power hungry, but don't require a lot of watts.