I replaced my 2006 IS 350 with a 2007 model after the first one was destroyed bu a dump truck.I was lucky to escape unscathed ( the car was written off ) Although I have recurring flashbacks. I Have had the 2007 model since November. I love this car. The space is tight at the back but my 2 teenagers don't seem to mind. So far the car has met my expectations. Today we had a heavy snowfall, hail. freezing rain...u name it.The car felt extremeely well balnced, the vdim kicked in a number of times to help out and then I figured out I had a snow button and it even got better. I don't believe you need all wheel drive after all. I am not sure howvever how the IS 250 withtout the VDIM would perform, it still has other safety systems I believe. I am curious. The one thing I hate about my IS is a lack of sun visor extender. My old ES 300 had it. I hope they remedy this in the future.