I have owned a pair of Fidelios for the last 1.5 years and have been very happy with the sound. I do not find them bright, I have them paired with tube electronics (Wavelength Duetto and Wadia 861 CD).
Over the years I have gone back and forth between monitors for the soundstaging, clarity (Celestion SL600, Aeial Model 5, Avalon Monitors, also home demo'ed Proac Response 2) and full range speakers for fuller extesnion and body (Mirage M3si, also home demo'ed Audio Physic Libra, Merlin VSM). The Fidelios do an excellent job of combining the stageing and clarity of monitors with the fullness of a larger speaker.
So far I have not felt the need to upgrade speakers.
Over the years I have gone back and forth between monitors for the soundstaging, clarity (Celestion SL600, Aeial Model 5, Avalon Monitors, also home demo'ed Proac Response 2) and full range speakers for fuller extesnion and body (Mirage M3si, also home demo'ed Audio Physic Libra, Merlin VSM). The Fidelios do an excellent job of combining the stageing and clarity of monitors with the fullness of a larger speaker.
So far I have not felt the need to upgrade speakers.