Vienna Acouctics Beethoven Concert Grand vs. Avalon ascendant mk2

Unfortunately I don't have oportunity to listen Avalons. Complicated situation...I have VA Beethoven Baby Grand and I want to upgrade the sound of my system. I heard the VA Beethoven Concert Grand and the sound is similar, very musical, but the VA BCG have bigger sound/stage. I didn't listen them with my amp but I think they are better than Baby grand. Did you have the oportunity to compare VA BBG and BCG?

itzhak1969 wrote -  The question is if you have proper system to drive such a demand speakers. The answer is that I am not sure. I guess that the most important is the amplifier and I have a pretty good amp that has a lot of power-Bladelius Thor  Mk3 Novitas  with 2 x 175w at 8 ohms(and 2 x 340w at 4 ohms).
-I don't know is it good enough to drive properly Avalons?
-Also I don't know much about positioning of Avalons (how much space they need)?
-I am also thinking about keeping Viennas and invest in better CD player(because I have large CD collection) and better cables. My cd player is Primare CD31 and Cables are Kimber KCAG? On that matter I have good combination for new Primare CD 35 and old(but good) Electrocompaniet emc-1up...
Any good suggestions and thoughs are wellcome

Thx steve59 for the post...I'm getting closer to deciding not to sell my speakers (in fact I was never really 100% sure I wanted to sell them).
In that case the question is how to get the maximum out of them, better speaker cables, better amp than thor,...??

...in case that I keep vienna bbg, I guess there's also space for sound improvement if I change my present speaker cables - Kimber 8TC with something better, maybe Kimber monocle XL or some Cardas or...?