I want to buy an X5 3.0, but I know that the new 3.5 TT engine will make its way into the X5 eventually, so I would like to wait for it to happen before making my purchase... the problem is; does anyone know when the new engine will make it into the X5? i have heard that the 535 and X3 may get it this year as the 2008 model year, but what about the X5??