The blades need surprisingly a lot of power to really sing, Meaning to pair the blades with a class A amp, and truely power them correctly will cost some real money in amp pairing
A KRELL Duo 300XD amp can be had used for around $7k. That is 300 watts Class A (when needed) and would be amazing with the Blades.
If I had the Blades I would use the new KRELL KSA i400. It is the 300XD on steroids.