Well my insider advice from Sony is to not buy Sony! - overpriced and outperformed by the rivals now and they know it. Panasonic's considered the best for visuals, not sure about the speakers.
Don't forget the low-slung comfy sofa
The advantage of plasma was that lcd tv's couldn't work well in big sizes. Which is why sony put most of their R&D into plasma, unfortunately lcd is almost as good quality now for large sizes and much much cheaper. Sony got it wrong and is still playing a painful game of catchup with lcd's.
Sorry for the thread drift but I don't have any info on projectors!