I just replaced my el-cheapo aluminum jack with this:
http://www.brandsplace.com/0246-ap-200lp.html
WHY?
The aluminum jack had such a low mechanical advantage, such that with a shorter handle(1 foot in length added to the first section), It took 2 men and a small boy on the end of the handle to lift the front or rear of the car. Just not good for me, plus the drop rate of the aluminum jack was VERY sensitive; careful or it was down all at once.
Yes, the above jack is HEAVY, Steel, but is so smooth, has a high mechanical advantage, so lifting the car is a snap, even with my shorter handle (same overall length as I had with the aluminum jack). The steel jack is heavy, but then I only need to drag it around, and do no need to lift it. The low pick up point is 2 3/4 inches, and the low profile continues back 10 inches from the center of the lift point to the upward sloping side rails.
It was free shipping as well.
Later,