I don't know. I'm thinking the new one will lose some of the more muscular body and hood lines of the current model. I wouldnt change a thing about the look of current 50i styling with 20's. I love it and I may opt for another one later this year before they are gone instead of ordering a 2014 next year. Look at what Porsche did to the Cayenne styling? Much more feminine body lines compared to the old one. Given the interior needed a ton of updates, I think the Cayenne could have looked more aggressive than it turned out. I'm thinking the new X5 may suffer the same and look too much like an X3.
Just a hunch. I like the current look a lot in 50i or Sport trim with 20s.