There is also the option to use very directional speakers angled up (so listener receives reflected sound from above). There are specially developped speakers available and coming (I find the idea a bit awful, but...).

Btw I too have a 'hybrid' setup in my AV this days: Denon receiver into 861 to stereo amp and main speakers (so I use the 861 for stereo, and as a 'bypass' for cinema). And Audyssey DID find different measured delays/distances than the real-physic distances for main speakers (but I do use IA45 as analog input, so this card may have different latency than IA00).

Regards

Josep

Basement: Linn Sneaky DS, 568.2mm, ARS Sonum Gran Filarmonia, Ramallo Allegro.
Living Room: 602, Linn Akurate DSM, Hypex Nc400, B&W 802D.