All that sums up to this If you want to watch hi def movies for the least amount of money but excellent quality go hddvd, if you want to watch movies on a expensive budget and excellent quality and get 7.1 sound go blu-ray. (Event thought scientist have stated the difference between 5.1` and 7.1 is only noticed by less than 2 percent of humans but go figure. Oh yeah if you go blu-ray go ps3 because you cant update all blueray players and thats one that i know you can. Im going hddvd now then blueray once the ps3 or upgradable bluray players hits 199.99 in 2008,9