I'm not sure how I feel about the X6 yet. Or the new 5er GT for that matter. They look kinda cool, and it seems like they might have a nitch market. Honda/Acura has made an attempt to "copy" them with their new Crosstour and ZDX.
I think an M version of both the X5 and X6 are awesome, but I am a truck guy at heart. I've always loved the Trailblazer SS, Cherokee SRT8, and the older GMC Typhoon, and the MB AMG ML's. The idea of hauling a family and towing my 4 wheelers at high speeds has always intrigued me