DeVore Gibbon X v. Vandersteen Quattro Wood CT w/Ayre AX5/20

My current system consists of Aerial Model 9s fed by an Ayre AX-5 Twenty integrated, a Lampizator Atlantic balanced plus dac, and a Mircorendu playing up sampled dsd 512. I have a nice sized room, 16'x24'x7.5'. Ceiling is a bit low.

I am looking to upgrade my speakers to something I can live with for 10 years or more. I tend to like speakers and gear described as natural and musical. I prefer a somewhat laid back presentation and prefer warm(ish) over ultradetailed. My current short list is  the Devore Gibbon X and the Vandy Quattro CT. I would like to spend about $15k, but could go as high as $20k if necessary.

 I spent a lot of time in the DeVore room at this past RMAF. I loved the Super 9s (but was not as wowed by the O93 and 96, which get rave reviews). John D told me that the Gibbon X is largely a better version of the Super 9 that will work better in a larger room such as mine. On a trip to NYC in April, I intend to audition the Xs at a shop in Manhattan.  I have heard the Vandys on multiple occasions at RMAF and will audition them soon at Audio Alternative in Fort Collins, Colo.

Even though I will get to audition both of these, it will be under very different circumstances than I have at home, smaller room, different electronics, etc. Thus, I am trying to get feedback from others who know these speakers.

I also have some interest in the Vandy 5a Carbon but wonder if my room is too small and my amp lacking enough power. I may also check out the Spatial x2.

Any iput will be greatly appreciated. Thanks.