Sonus Faber Grand Piano or Totem Forrest?

The Forrest would be my recommendation as they are more versatile considering your repertoire. I generally like SF products but think that their Homage series far exceeds their other series. I heard the Grand Piano and was not that smitten. On the other hand, I heard the Forrest several times and each time was quite impressed by their enveloping sound.

I have owned Totem and they were great sounding on any type of music. I have only heard SF for demos, but I found them too 'polite' for rock or rap, sounded great with classical. So I agree with @marakanetz.  Just an opinion on what I've personally heard, not trying to start an argument.

I owed Rotel a while back, either amp would be fine, but most would say a little extra power never hurts. If you plan on getting a sub, then you can go with the 1070 (I'd recommend a sub with any speaker regardless), otherwise I'd go with the 1080.

Hope this helps.

These will blow away either. The Totems are about the same price point.

https://www.usaudiomart.com/details/649979124-dynaudio-focus-380-floor-standing-speakers-will-ship-conus-via-freight/

The Grand Piano was released over 25 years ago. How old are the ones you are looking at?

I saw a few Grand Pianos in the past and was never too impressed whereas I fell in love with every Totem I have heard.

I would read the stereophile reviews of both and figure out the strength and weaknesses. On paper, the SF looks a little meatier but nothing beats synergy.

Uh, this post is 20 years old so may be a little late to chime in now unless the OP takes a looooooong time to make decisions.