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
@audioconnection ,
Johnny, kudos to you. Thanks for all your time and effort.
I only really needed the info on the lower inputs and crossover frequency setting, but your input is really commendable. Thanks A LOT.
I am picking the amp up today in ... Prague :-)  Great reason for a fun trip with my better half. The beer is fabulous and the pork knuckles are fantastic... as always. 
oh man jazz one of my favorite cities in tge world...a hot Aesthetix date in that town !!!!!!!!
as you no doubt know a stop in Pilsen for some beer and MEAT is an essential diversion.....

man, i dont miss trying to build airplanes there...but I do miss that corner of the world..

keep us in the loop on the sounds
Tested the built-in xlr crossover vs rca quatro. The built-in sounded more open and transparent.
@audioconnection , your experience is different, right?