Given your speakers, so much will depend on how loud you like to listen.
I own the PL2 and the PL5 and have used them with speakers that have ranged from 85db efficient to 90db efficient. I listen at moderate levels, but there is enough left to go louder if I wish.
Personally, I would go with the PL Premium and mostly because of my good time with the PL2. I have owned PL products since 2005 with zero issues.
Big fan.
Rich