Avalon Speaker + Electrocompaniet Amp = Good?

1)I’m using a EC-4.8 Pre-amp and AW-180 Mono-block Power amp now, and interest in Avalon’s Idea or Ascendent II, not sure if my amp can drive these speaker? How's the sound quality ?

2)Also in term of sounds, which speaker has better sound in your opinion – Idea or Ascendent II?

3)Does Ascendent II still in production or already fade out?

PS: My CDP is Esoteric X-03SE, current speaker is Diapason’s Karis bookshelf