I am surprised you found the B&W800D and Sonus Fabers (you didn't state model) disappointing - I have experienced superb demos of the B&W800D and Amati Anniversario speakers. In both cases they were carefully matched to appropriate amplification (Classe or MacIntosh for 800D and Musical Fidelity AMS50 pure Class A for Amati). Both sounded well balanced, articulate and involving.
Back to the R909 - a friend owns these and so I have listened to them many times - they are brilliant. They have best bass articulation of any loudspeaker I have ever heard, one of the most transparent midranges and a very good treble. They measure flat and sound neutral without typical box colourations. Perhaps some might miss the lack of warmth through the midbass, but then they reward you with precision deep bass-lines that only a dipole design can deliver. The only minor short-coming I can detect is that maganesium cone midrange does not reward edgy class AB solid state amplifiers - do consider amplifiers that are naturally smooth and warm (ideally with significant class A bias). My friend uses 30W Marantz class A amplifiers which drive them to more than adequate sound levels.
Do note that because they are dipole design, they need breathing space behind them, but then they reward with a deep layered soundstage that few box loudspeakers seem capable of.
They remain one of my all-time favourite loudspeakers!
Back to the R909 - a friend owns these and so I have listened to them many times - they are brilliant. They have best bass articulation of any loudspeaker I have ever heard, one of the most transparent midranges and a very good treble. They measure flat and sound neutral without typical box colourations. Perhaps some might miss the lack of warmth through the midbass, but then they reward you with precision deep bass-lines that only a dipole design can deliver. The only minor short-coming I can detect is that maganesium cone midrange does not reward edgy class AB solid state amplifiers - do consider amplifiers that are naturally smooth and warm (ideally with significant class A bias). My friend uses 30W Marantz class A amplifiers which drive them to more than adequate sound levels.
Do note that because they are dipole design, they need breathing space behind them, but then they reward with a deep layered soundstage that few box loudspeakers seem capable of.
They remain one of my all-time favourite loudspeakers!