I have always been partial to Rotary lifts. They seem to have the best ergonomics, and are durable and reliable.
When we moved into the new building, we got a few more 2-post lifts, they are Challenger. They were cheaper, and despite
looking a little beefier, they are the same 10k pound capacity. I find them a little clunky to use, and the arms do not drop as low to the ground as our Rotary, but that may just be the design they are.
A 2-post above ground lift is the most commonly used, and the most versatile for the most jobs, but keep in mind the concrete floor they are bolted to has to be a very specific thickness and compound, so be sure that whomever you have doing the floor knows this and takes that into consideration.
While the weight capacity is plenty, know that they are not the most stable for very long vehicles, and some stuff can be tricky to rack depending on the arrangement of the undercarriage. Ford trucks come to mind, as they have a frame that kicks UP in the back right after the cab.
On A4 platform VAG cars, on the Golfs and Jettas, I generally lift them with the arm pads flat on the pinch welds ahead of the rear wheels and aft of the front wheels. Spreads the load out, will not damage anything. On the New Beetle sedans, I go into the unibody box rail in front, then flip the short extender up in the rear and get them on the little round nub that sticks down right near where the parking brake cable passes. This is because their rockers are shaped differently. You need to do the same thing on and G/J with side rocker trim (like some GLX/GLI/GTI models), as well as Audi TTs. The NB 'vert has a rocker reinforcement running down the side, so you can usually just grab the flats there, but I sometimes do them the same as the sedans.
B5s, C3s, etc. grab the flats BUT there is only a very small spot in the back because if you go too far in you can hit something else, so you have to make sure that you just grab the outer most spots.
A5s have designated spots sticking down from the pinch welds, like most Hondas, but the rear ones are about a foot forward from the rear wheels for some reason. A6 is the same.
NCS Jettas and 2012+ Beetles (same platform underneath) have those spots further back in the rear, where they belong. NMS Passats are similar.
I can take some pictures from under some cars if you like.
4-post lifts are not as versatile, but are good for heavier duty stuff. We have two of those here, one is our dedicated truck rack, the other is our alignment rack, but sometimes has to double duty for other things as necessary. And it is still a royal pain to get transmissions out of Transits, something that is a very common necessity here.