I am not saying to get a 4 post but it does have some advantages.
http://www.challengerlifts.com/pdf/home_enthusiast.pdf
I have a Challenger 4 post for home and their RJ 4.5 rolling jack. The jack is not as versatile as far as pad placement for the lifting points. If you need to lift towards the center as I do you need to make pads for the center of the jack. If you need to reach out further than the jack can reach (which is the case on my Porsche 911) you are out of luck.
A big benefit is that it is car storage and you can park underneath it, without too much trouble which I do. And it is much easier to lift the car in general.
Many of the two posts on the market are Chinese crap. I went with a known brand so I got Chinese crap that has been vetted by a company that knows about lifts.
Good luck!