Tannoy or Volti

I have not heard either, but noticed Upscale Audio is selling all of their Tannoy at close-out prices, with the GRF priced at $12,500/pair (half price), so maybe you can use that as leverage to get the selling price down on the used Tannoy?  Both should be great speakers.  If your room size is not particularly large, or if you sit closer than 10' from your speakers, the dual concentric drivers of Tannoy may be a better fit for your room.

I am back about 16 ft…the speakers are about 12 ft apart…..so many speakers in the $16000 range…

I wonder how the Tannoy would compare to the Coherent Fifteens you have…the Tannoy Prestige GRF 90 are a one owner…

I really like and have heard both the Volti Rival and Lucera but I've not heard any Tannoy GRF speakers. The Volti's should be easier to drive if that's an issue.

Not an issue, I have a Pass Labs amp and a Jeff  Rowland which ever sounds  the best…..doesn’t have to be any of the speakers I mentioned…any thing in the $16000 range

Used Prestige GRF 90s regularly sell for ~$9K, +/- $1K, based on condition. While a concentric speaker like that is intrinsically different from your Forte IVs, the Voltis are much the same, so while you might prefer the Voltis to the Forte IVs, it is more of a lateral move, IMO. Enjoy!