Avalon Eidolon Diamond or Aerial 20T v2.

Same tweeter as Isis, same midrange as Indra and same woofer as Diamond but two for each speaker. Just under US$ 50K.

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.

I know what you are saying. I had Eidolons (not diamond). I looked at Indra and preferred it over my Eidolons because the crossover (see holographic thing) was just way better. That is what Avalon is doing better than most and also why the set up is so critical. Remember I said above if you don't have the room for Avalons they become common. That's why you didn't like Indra. They weren't set up correctly. The dealer is probably trying to get the diamonds moved, plus they are 2x the price. With the new model dealers are moving the diamonds which is why there have been so many for sale lately. Then I heard Isis and it was everything all in one. But I don't find that price tag too appealing.

The 20ts do a lot of things I liked about Isis. The bass slam is there. The resolution is there. The imaging is there. If you can spread them out (they like that) the soundstage is good. And for a lot less $. Of course remember that's V1. V2 is supposed to be an entirely different animal, and much better! I should probably make that upgrade to mine and quit!

I was never sold on the Indra either. But I have never liked the Ceramic tweeter at all in any speaker. I have heard the Indra 3 times and I came away wanting more weight and backbone.

Check out the implementation of the ceramic tweeters in the various Tidal Audio speakers (e.g., Amea and Contriva). They both use a 30mm version of the Accuton tweeter (Indra uses a 25mm Accuton). BTW, I have heard that the Indra does some things better than the Eidolon Diamonds.