I used to drive a 2004 FX 35, test drove the new FX 35, X6 35i and I wind up buying the X 5 4.8.

The FX as pointed out earlier is more comparable with X6. The X5 is not on par when it comes to speed, which should come as no surprise.

I like my X5 a lot, but let's not kid ourselves, there are plenty room for improvement: Rear view camera, Navigation, reliability.

Again I am happy with X5, but would have been as happy with new FX50. The main issue for me was the new design. Some like it some don't... I don't!