Although I have not heard the Futuras, I would imagine at their price point they would sound better than the Nova. I myself could not afford the Amati, so I never took the time to audition. But after 3 years of auditioning speakers, I settled on the Nova III’s which stretched my budget beyond my intended investment. I really wanted the 5’s but that was further away financially. My room as well is 16 x 28 and I was concerned that the 3’s would be too small, but to my surprise they seem to be a perfect fit. I also bought the C1 Center and the Nova 1’s for rear. I am still waiting on the 1’s and stands 7 months and counting (thank you covid or whoever is to blame).
I have about 350 hours on the 3’s and they breaking in nicely. I am amazed at the transition of these from day one till now. They required some patience and at times I was thinking I had made a grave error. But now I am quite happy. The other part is I had bought a new Audio Research LS28 and it had to break in as well.
It is your decision but I will caution you if you buy the Nova’s, unless your dealer has has them on a shelf, be prepared to wait.
good luck
Theo