Thank you all very much for your advice and suggestions.
I'm going to travel to LA next Saturday to audition the VMPS so I should have a better idea how they stack up against the more conventional design. Also, I actually did hear the Gibbon 9 from DeVore Fidelity a few years ago when I lived in NYC. I wasn't looking for speakers at that time so I didn't really concentrate well enough to fully appreciate the speaker, but I remember it to be very transparent, detailed and "clean." However, I also found it to be a little lean and given it $6500 price, I think the speakers in my original list, especially the Vandersteen, might be more of what I'm looking for.
I too find the Hyperion look to be rather unattractive. Their reviews are superb, however, and they are selling "B stock" of the speaker at 50% discount on their website. I emailed Hyperion asking what "B stock" meant in reference to this particular speaker, and whether there were Hyperion dealers in California, but the response I received was quite disappointing. The manager completely ignored my inquiry about B stock and simply apologized for not having dealers in California where they are based, which I must say I find very strange. I asked again and my email has been ignored. At this price point, it is simply unacceptable and extremely unprofessional, and I won't be buying Hyperion speakers any time soon if that's the level of customer service I can expect.
I wish there was someone on the forum who owns the Sonatina as I absolutely love the look of this speaker and if it sounds as good as it looks, it might be the winner.
The search continues...