If your a big fan ,keep it and also the earlier box set with the silver embossed alien , of the release most of extras are relegated
to Alien . There are some serious issue's with Blu Ray:, and that is sloppy mastering , my set has some issues , I loaded
Aliens and picture was displayed at zoom 3 or maybe 4 I had to play around with the search menu and it display fine, so that is very good reason to keep your previous editions ............