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
They are. We are all metric and centigrade, you know...

As for the size: "The two fronts are cones ¼ X 20 threads and a special spike in the rear with spacers for tilt 3/8 X 16 thread."

So, total we are 4 front cones and 2 back spikes, right?
(()(So, the total we are 4 front cones and 2 back spikes, right? )))))
  Yes correct
All done, will try to screw them in tomorrow.
Can’t attach pics here. How’s it done?