Nice pics dude, for help with the wheel blurring, you have to stretch the wheels out into a circle, then blur it, then squish it back, that way it acually looks like its spinning, instead of just getting deformed. Also, for pictures with zoom blur, its usually better to have an angle fairly close to the ground, because the way you have it now, the blur is acually pointing into the car instead of going the direction its going. That way you have it now only really works in a shot that is directly from behind, and/or on a straight road.