Proac response One SC or Proac response D15??

Hi Dear fellows!!
I have a square listening room ( about 14.5 feet X 14, 5 feet) The worst geometry in audio hehe!!!, but I did a very decent work by setting my audio system not centered in the room, with a big bookshelf on the right ,  heavy curtains on the left and a big absorbing sofa with a heavy curtain in the back and it works ok.I actually use Proac one SC monitor speakers associated with jadis orchestra amplifier, ead dsp 900 pro dac , audio alchemy dti pro   and a modest California Audio Labs Delta.The proacs one SC works perfect, there is clarity, focus, good imaging but I notice a little lack of bass heavyness.My question is:....... Do you think the newer Proacs D15 floorstanding speakers have the same clarity of Proac one sc but having at the same time fuller  and plenty bass or by using these D15 I will loose the clarity so beautiful achieved in the smaller One SC monitors??

Another question is: Do you think that in using Proacs D15 I will have problems of reflections due to the geometry and size of the room?
I know that the best solution is to compare them side by side, but that is no possible in this case due to distance and  also beacuse I have to sell my proacs one sc in order to get the money for buying the D15(a little risky situation indeed)
I will highly appreciate your advice!!
Cheers!

Raf