[Cloudsurfer]

Are you desiring a lift for added car storage, or to work on the car? A four post lift is for car storage or for an exhaust shop. If you want to work on the car, you'll find it virtually useless.

Any two post lift needs to be bolted to the floor, and you must have concrete that is of appropriate PSI and thickness. If you want to work on the car, you really want a two post lift, but with a car like a Porsche, you can get away with a scissor lift, but they are useless for any "normal" cars (BMWs, S2000s, Audis, etc) for anything beyond working on the corners of the car, as the scissor mechanism blocks access to the driveline.