I have a small collection right now because I just got into alien and predator again for the first time in about 2 years 3 months ago so right now I have:
Alien, Aliens, Avp, Avpr, on dvd
Alien vs predator total destruction collection (which has all pred alien and avp movies so I have 4 of the movies I already had.
And I just bought and AVPR poster 27x40 for my movie room