Thanks Alberto,
Yes I like also the idea to tweak the sound depending on the recording / mood / time of day and so on. I will even keep the ARC 100.2 for ambiance music and my son's parties...
Moreover, collecting tube amps is a funny hobby
!
The greek importer told me that the Lafon GM70 could be not enough for my speakers because he said that the power of 20 W is for 16 ohms only. At 8 ohms, it goes down to 10 W. He suggested Corton Charlemagne, but I 'm not looking for an other push pull of KT88.... : I have the King of them !
So I will wait for his other suggestions...