I am thinking about replacing my D3 with an F90BT, but I would like to know whether or not the F90BT does physics processing? One of my favorite things about my D3 is that I can see how many lateral G's I pull when I am canyon carving.

It has internal gyros and does use that information to aid in navigating just like the D3 does, but it does not display any of that info like you can on the D3.

Well, that's the deciding factor. I'm keeping my D3 and just getting the DVD changer. Thanks!