What image does BMW conjure up in your mind? A car that handles like a dream, that is fast and sporty yet luxurious and comfortable? Chances are that's exactly what you expect of a BMW. An SUV? It conjures up a rugged truck-like vehicle that goes off-road but does not deliver a smooth ride or good handling on the highway.A sport-utility vehicle from BMW? Can it be? That's the question many have asked since BMW announced it was introducing a "sport activity vehicle." It's now on sale in the US and it promises to change the perception of the SUV. If you've been looking for a luxury SUV that is as pleasant to drive as a luxury sedan, the