The best 2-post lift I've seen is an electric screw lift made by Nussbaum of Germany. These are around $3000 plus freight. The lift can be stopped in any position safely, has no hydraulics, is very quiet, and has fairly low posts (124"). For any full-rise lift, a 12' ceiling is about the minimum .
For further info on lift options, see http://www.ultimategarage.com/UltGar2c.htm