I have 2006 Acura RL and its stereo blows away my X5's stereo. Granted, my X5 doesn't have Logic 7, but I've heard Logic 7 in both 335i and 750i, and Acura RL stereo still sounded more detailed (a bit weaker bass though). So when someone says 2010 MDX stereo sounding good, I do not doubt it much, although, MDX stereo is rather a cheaper 5.1 version compared to RLs (Bose 5.1).
It is hard to imagine MDX having better driving dynamics than RL. With that said, when I get into my X5, I feel like getting into a sports car compare to RL. So I can imagine how MDX would feel in comparison. With that said, MDX may be a good car for others but it would not be my choice.
