If your priorities are timbre, holographic imaging, and smoothness, the Vandy's are a very good suggestion.
Maggie 1.6's will give you excellent timbre and smoothness, but will not give you pinpoint imaging. To me, it's a worthwhile tradeoff - I personally find the boxlessness of the Maggies to be magical. I don't sell them, but I admire them a lot. The Maggie 1.6's draw me deeper into the music than anything else in their price range, with the exception of a good pair of old Quad 57's. But then the Quad 57 is a highly specialized loudspeaker.
If you have a Maggie dealer in reasonable driving distance, consider making the pilgrimage. If not, consider taking Magnepan up on their MMG offer - for $550 they will ship you a pair of MMG's. You can return them for a full refund within 60 days, or trade them in up to a year later towards a bigger pair. Aside from the MMG's being the best $550 speaker out there, it's a great way to find out what Maggies sound like.
You might find a used pair of Innersound Isis speakers in your price range - this hybrid electrostatic has superb imaging, but a fairly narrow sweet spot. It has better resolution and dynamics than the Maggie 1.6's, but the Maggies have a smoother and more forgiving tonal balance. Depends on your personal preferences.
Best wishes on your quest!