If I was in the market for a Luxury SUV, I would look at the Lexus RX400h first, mostly because of the fuel economy (uses about half the gas of a 6 cylindar X5 city, much better highway too), but I also like the looks, and the interior. The Lexus and 3.0 X5 are basically the same price too (don't know much about the options) . But if that's not an option, then the X5 for sure, because, well, this is a BMW forum, what answer would you expect
. I personally like the X5 looks more than the Audi. And as a few people said, the reliability of the Audi is really yet to be known.