I prefer blu-rays, but, not available for some shows/movies. So, for example, Warehouse 13 is only available in DVD format, unless I watch online, then it's HD. iTunes, however, has it available in SD or HD formats, and charges more for the HD format, but, what am I really getting? is it upscaled SD to HD, going to look like an upscaled DVD? or does apple use the actual HD content from the source (syfy in this case) for the HD format available in iTunes? And how do I know it's actually 1080p and not 720p/1080i "converted" to 1080p? I did a search, so if I missed a thread on this subject, please help me out by posting a link. Thanks!