Update,

The above is with the Oppo set to output bitstream, not sure if this is correct but when I change to LPCM I get the normal stereo option (direct, Trifield etc.) on the DVD setting.

Cheers and apologies for the fragmented posts - it's been an interesting evening.

861, G98, 568.2, DSP5K, SVS PC 13 Ultra, Pioneer KRP600, LG 77CX, BDI 3379.