Before my X3 (3.0) I've had Audis and Volvos. The ride of the X3 is firmer and definitely more responsive--and as advertised, fun to drive. It seems to perform every bit as well as my wife's 325. The interior may not be quite as refined as an Audi but it is designed well and has a fairly decent audio system. The all-wheel drive works great. I found it to be much more comfortable in size compared to the X-5 and other of the larger SUVs. So far a real winner.
Awesome Moon Roof--the biggest I've ever seen. Great performance.
An alarm system shouldn't be an option on a car in this price range.