You have seen my 2 post hoist that was given to me by a "friend" - makes working on the car much more pleasurable but puts a bit more strain on the shoulders as you are always working with your arms up in the air and you also bang your head a lot more.
Two post has the advantage of leaving the wheels dangling so it is easy to work on the suspension.
4 post "drive on type" means it sits on the wheels and suspension but is quicker and easier to get the car up and down - presumably it is more useful in a shop situation when working on exhausts engines and transmission but a bit limited when you need to get at a 108/9 suspension.
You will also need a shed with lots of headroom as the car goes a long way up in the air and at least one transmission jack.
You often actually need two transmission jacks to hold two parts at the same time.
Mine has made a lot of little jobs more pleasurable because even if you are working under the ponnet from the top you can raise the car up a bit to help an aching back - and if you drop a bolt just raise the car and pick it up - Decadence

Bill