Excellent review, Jason. I'm so glad you were pleased with Spiff''s Axioms. Thought I've never heard them, I suspect you'll find the M80s will deliver a bit more bass. And, being an EP500 owner, I feel safe in saying that if the 80s still aren't enough, the 500 will provide all the bass you could want. Enjoy!

(P.S. First tenor vocalist here. )

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton