Shahinian Obelisk vs VandersteenTreo


HI fellow ’goners.
I own the Shahinians, thinking of upgrading to the Treos. The Obelisks sound a little smallish for the room... And the room is not square, it's a big living area of a house, with access to the second floor's roof. 
Will this be an upgrade or just a sideward move?
Room approx 60m2, driven by Musical Fidelity A5.5, 250wpc at 8Ohm (thinking of replacing this one too).
Mostly jazz and acoustic music, less frequently - classical and pop.
Thanks!

ja_zz
Johnny,
Thanks.  These brands are not too common here where I live, but the blueprint is clear. 
What WPC is a good starting point?
Thanks again. 
Aesthetix Atlas Stereo amp is a killer
i know of one in Seattle area
maybe $5k
its at Gig Harbor Audio

Tomic601,
Trouble is, again, that I am in Russia and we are 220V...
Aesthetix sells in Europe, they are 230V, and it’s a bit closer :-)
What other brands make those 0 feedback designs?
Thanks!
I know that there were a pair of Ayre Monoblocks for sale in France last year with 220 volt, so they are out there. 

B