Considering adding a lift - thoughts on 2-post vs. 4-post?

I am considering adding a lift to my shop. My work area is 20x40 with about 10' at the far end being taken up with workbenches and storage. So that leaves 20x30 as the workable area for a lift. I would welcome any thoughts on the pros and cons to both lift styles, and why you like it or don't like it.

My thoughts on a 4-post lift...
PRO:
I can store one car up while working on another car underneath it.
It should be super stable.

CON:
It takes a lot more floor space.
It will severely restrict access from the shop door, which means I may struggle getting the table saw out and other large items in.
You can't work on wheels/tires/brakes etc in the raised position.

Thoughts on the 2-post lift...
PRO:
It is relatively compact.
It doesn't take a ton of space.
I would have a lot of flexibility in placement and can get other vehicles in the shop.

CON:
Is it dangerous if the vehicle is not at the perfect balance point?
Not as simple for long term storage of another car up.

Your input is appreciated,
Zach