First of all let's hope they release them separately.
If that is the case i'll definitely take RAIDERS and CRUSADE and leave DOOM collecting dust in a warehouse.
When I first saw RAIDERS I thought it was the most amazing film i'd seen. However after looking back some 20 some years and reviewing each adventure i'd have to now say that CRUSADE is my favorite, mainly because of Sean Connery.
What makes Sean so great is that he plays against type and I love the storyline of an estranged father/son who are forced to go on an adventure together. As Spielberg stated in the special features about the film, the Holy Grail wasn't so much about the grail itself, but the quest of re-discovery between father and son. Add in good bad guys and interesting allies, makes for a great film.
Can't wait till they are released on BD.