Hi! I might be buying these. What amp would you recommend? I have a budget of around 300 euros for it and I don't mind going to the used market. I was thinking about a CTH, a Chord Mojo or an iFi BL nano, but I haven't read much consensus about these. I did read against a lot of cheap tubes (like DarkVoice or LittleDot MK-any). What would you guys who own(ed) them recommend (no need to stick to any of the mentioned ones!)? Thanks! Edit: For what it's worth, I would be listening to metal with this pairing.