I would consider replacing my Model 990 for a R972 if it gives me an improvement in sound quality, with and without Trinnov enabled. My speaker lay out is pretty close to ITU 5.1, with almost equal speaker distances (7' to 7,5'). My interest in Trinnov is to be able to heighten the soundfield for movie watching, using additional height speakers. Not at the expense of giving in on sound quality though...