need amplification help for sonus faber amati

Hallo everybody,

I was lucky to get a pair of SF Amati speakers.listening to them with a McIntosh mc402 and a preamp McIntosh c2200 does not satisfy me. I feel that the Amatis are just perfect for my ears but I need to amplify them better. I would like to find an amplifier and Preamp combination that makes them disapear completely. also I need a second hand combination under 10k € for money reason.
What is out there, a little bit older but still reliable (tube or solid state) that you would recommand to have a big soundstage, lots of details and enough power.
Thank you for your help,
greatings from Paris
Daniel

I also have two understanding questions:
1- the power rating seems so different between solid state and tube amps. why do I need less watts in tube amps for the same result?
2- what is more responsable for a wide soundstage: the amp or the preamp?