Im thinking of buying a dedicated blu-ray player such as the sony bdp-s760 or the pioneer bdp-320. I am currently using my ps3 but have heard that longterm use for blu-rays/dvds can stress them causing failure. Also would like to know what sort of advantage in picture and sound quality im likely to gain over the ps3 and would it justify the outlay. Any knowledge would be appreciated especially if someone has both units.