How many WPC?

If less than 100wpc into 8 ohms dont bother. 150wpc even better.

If you want to keep it and are looking to an eventual big room you will need power.

I have a NAD 777. It is fine. No axioms in that setup though.

I drive my M5s with a ~300wpc into 4ohm integrated amp. Pretty pretty pretty good.

[Linked Image from media4.giphy.com]

I have very recently heard M5s off of a Denon 750. Not as good, but still ok. Power makes a difference.