I got a (brief) opportunity to listen in as a customer at a local dealer A-B'd the Vantage vs the Summit. The music wasn't my cup of tea - synth heavy rock- so I can't tell you much about the speakers in the absolute. I can say that, off the one listen - I'd choose the Vantage and pocket the difference. Whatever difference there is in deep bass between the 2 models wasn't really evident, despite music that was chosen (I assume) to allow the listener to discern just that. Ancillary equipment, room acoutics, etc probably didn't help.
FWIW-I had much the same reaction to an A-B of the Vandy 5A and Quattro. I suspect that the differences in ultimate capability of the pricier speakers would be more easily heard in a more carefully constructed demo. However, if your regular listening doesn't include appropriate source material, suitable ancillaries, room acoustics, etc-you may not hear much difference at home either. That's probably true in my case and the less expensive options would suit me just fine. YMMV.
Marty
FWIW-I had much the same reaction to an A-B of the Vandy 5A and Quattro. I suspect that the differences in ultimate capability of the pricier speakers would be more easily heard in a more carefully constructed demo. However, if your regular listening doesn't include appropriate source material, suitable ancillaries, room acoustics, etc-you may not hear much difference at home either. That's probably true in my case and the less expensive options would suit me just fine. YMMV.
Marty