I know this will be a biased forum, hehe, but seriously, I can get them both for similar pricing, maybe a few thousand more for a new 2018 Trackhawk. From what I read the X3m Competition is 0-60 in the mid 3s range (BMW understates it at 4.0) which puts it up there with the Trackhawk. Won't have the torque the Trackhawk has but will be more refined inside I would think. I love music and I hear the X3m Harmon Kardon is 'okay' but not great. Is the upgraded Trackhawk Harmon Kardon great? I don't care about gas mileage really. I like a comfy interior but understand with a supercar SUV you can only get so much comfort. Reliability is important. Any advice on this important choice? Thanks!