For the 5th Element, make sure you have the 2nd edition - Sony really botched the first release. It was terribly bad. But they made amends with a second edition and, I think, a trade-in program. They only did that because the HD format wars were in full swing and they couldn't afford to have a flagship title look so sucular.

FWIW, District 9 was shot with the Red-1 camera which is why it looks so sharp, another movie shot with Red-1 is Gamer which also looks fantastic and the plot isn't too bad either.