I'm sure that BMW won't stay behind Porsche and especially Mercedes with their new rumored ML55 AMG with a supercharged 460 HP engine.
I bet we'll see at least the upcoming V10 with 500 HP in the X5. Maybe not in the current X5 generation but surely with the next one.
The SUV market is a pretty risky business right now. If the US attacks Iraq, I'm sure that fuel prices will hurt a lot of people.
But I guess fuel prices don't count that much in such a situation.