8 ohm speaker that sounds like sonus faber


Looking at a easy to drive speaker to use with tube amps around 70 watts.
rugby1
I'm using the Harbeth M-40.1's with a 75WPC integrated. They sell for $12K retail or $8K used. Harbeth's are known for being warm, smooth and musical, much like Sonus Faber. There's a like-new pair listed right now for $7,800.
You could also look at Verity (Parsifal Encore, in my case) which is a little warmer and less extended than the Cremona, but overall barks up a similar tree. Not quite the same, but in the same neighborhood. The Parsifal Encore isn't a super easy load, but most 70wpc tube amps should work well.

I currently both own Parsifal Encores and Cremonas so my opinion is based on long experience with both speakers in my own home. Doesn't mean you'll agree with my assessment, but -if you like the Cremonas - I suspect that you'd be pretty happy with the choice.

Marty
The PE's IMHO are a fairly tough load. I think they are a great speaker, but surely not an 8ohm load. An amp that drove them well for me was an Air Tight ATM-2 at 75-80 watts.
Of course the ATM-2 w/ Tamura Transformers are not your average 80 watt tube amp. The Fidelio Encore, while not as full range, is an easier load that will work w/ 60-70 watts.
Not saying the Parsifal cannot, but it will be more of an individual opinion, w/ things like room size and type of music perhaps coming in to play. Again, all this IMHO.