Yes, the Defender is probably by far the best you can buy currently for Australian conditions - not only reasonable area of glass, but it is all almost vertical. And, apart from the 2007 model, the vents allow you to ventilate the interior while parked, without affecting security or allowing water ingress. The second best vehicles available today are probably the other utility type four wheel drives, such as the troopy and even the Hummer H1 (but not H2 or H3).
John

