Funny enough, I never saw "Last Crusade" in the theater. For that, the marathon would be a great option for me to finally see the third chapter on the big screen. The thing is, when it comes to these marathons I just don't know about sitting in a theater all day long. Seeing 2 movies in a single day can be a bit exhausting.
However, seeing "Raiders" in IMAX would be very cool! I'm definitely glad to have some IMAX theaters close by.