this is for a middle aged woman who has two teenagers and lives in a cold climate half the year. thank you so much for responding to these please if you know anything good or bad about any of these vehicles.

All are luxurious.
The Buick Enclave is a compact luxury SUV. It won as the best small SUV for 2007.
The Porsche Cayenne is a midsized SUV. It has been the best selling SUV since it came out in 2004. They already sold over 200,000 2007 models of the Cayenne.
The Acura MDX is also midsized and most reliable. It also has the most advanced bluetooth phone and voice activation technology. It has the smoothest ride and handles like a car.
The BMW X5 is okay, but most expensive to fix and least reliable. It also has a rougher ride than the others.

I have driven these cars.