The Indra with the BAT vk600se in a 14 foot wide room may have very good bass.
Indeed, Avalon's are very finicky about set-up, power, and components.
In terms of bass, there are very few speakers that do that cohesively so that music has the weight you are speaking about. Unfortunately, that costs money. The Isis does it, so does the Kharma Exquisite Ref. There are a handful of others. Short of that, I would prefer quality rather than quantity.
Indeed, Avalon's are very finicky about set-up, power, and components.
In terms of bass, there are very few speakers that do that cohesively so that music has the weight you are speaking about. Unfortunately, that costs money. The Isis does it, so does the Kharma Exquisite Ref. There are a handful of others. Short of that, I would prefer quality rather than quantity.