It never hurts to ask questions, or show interest in the differences of how 3D can be displayed in 2D. 8) I'm interested in the differences in a "gee, that's neat" way but when highly rarefied and refined tech talk starts getting muttered, unasked and obscuring a simple answer to a non-technical question, then enough is enough. If/when I want a more in-depth look at the technical details then I'll start researching it. I'm with you about retaining the best audio/video quality. Happy backups!