I've used them all,and think the two post asymetrical has the fewest disadvantages. When we built my friends garage,we planned for the lift,and increased the concrete depth to 6" for the areas where the lift bolts down. The lift is the model with the cables and hyd lines run through a channel on the floor giving unrestricted height. The ceiling is 13',and a 3/4 ton pu w/cap just clears the lights. Watch out for the unsupported plastic hyd reservoir,they break off at the mounting flange on cold October days for no obvious reason(happened last month). Could use some sort of support bracket. Get the highest rated lift you can afford. By the way,a lift makes you suddenly more popular too! Hank