What amp for Q5's? Spectral, Solution, Gryphon

If you are going to consider Spectral, I would add the DMA 260 to your list. I know at least 2 people that bought the 260 over the 360 Series 2. Hard to believe a 10k amp competes with the upper tier you are exploring but apparently it does.

Good luck on your quest and congrats on the Q5's!

From your list, it would be between Spectral and VAC for me.

You need to listen to all of the contenders with your Magico's at this level however.

I `d love the opprotunity to hear this speaker driven by either the VAC 450 or the Chalice Audio Grail mono blocks.
I`ve heard Magico with the Soulution(granted under show conditions) I was`nt moved by the experince at all.

Vac 450 for me. I'm not a Magico/Spectral fan from what I've heard at shows.

What pre-amp?
Qs would certainly benefit from some sort of soul infusion..
Assuming amp/pre from same manufacturer, the VAC 450 and probably Vitus should you choose to go SS.
Would consider Soulution, Gryphon, Boulder only with good tubed pre fronting them.