Wilson Sasha , Avalon Indra or Magico V3?

Wilson, Spectral, and MIT are always put together for trade show and demo. They are often sold together. So I would think Wilson would be a good start.

the cheaper out of the three and better if its sounds the best....

Speakers are a very personal choice, you must audition them with your electronics and your music, not demo discs and decide which you like the best. Your electronics are superb and as Bikerduud suggests, MIT is the only way to go with Spectral so as to achieve their maximum performance. Best of luck with your search and trust your own ears as you are the one who has to live with the speakers.Reviews are just a guide.

Am running Avalon Indra in exactly this setup.

Most choice.

Did not care at all for the Magico V3

Both Verity Audio and Rockport's offerings deserve consideration too.

Suffice as already noted speaker choice at this level is very individual.

Wow, the OP's question is exactly the question that's been burning in my mind. So my question is answered by the replies.

One further question though - Spectral gear is very fast and neutral so would it be better to partner them with something warmer like the SF Amati Anniversario?