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
Re amps:
Atma-Sphere MA-1's with MP-3- Total knock out of the park
I will be setting up my Ayre MXR (non Twenties) and a recently upgraded pair of McCormack DNA-1's that Steve was challenged to give the Atma's a run for the money.
Sound Anchors just delivered my amp stands, so once things are put together it is off to the races....
@ja_zz 
When you get your Quatro's repaired, I think you might be considering other speakers for back up.
Bob
gdnr.....leave the mxr on ! they take quite a bit to really warm up and bloom

but i can assure you they are very very good
i first heard them driving model 7 at RV’s
Bob,
On top of Shahinians I have a pair of open-baffle speakers of local make (Noize Fabrik) and KEF LS50s.
But... I don’t like the idea of backup speakers. Might give the main pair the idea that they r entitled to a vacation :-)
http://roshiend.ru/audiotech-page/noize-fabrik-scutum-3-0/

Here’s a link to one of my speakers.
They are extraordinary, BUT they need the right room to play well. In my room they don’t work, unfortunately. No bass.