Do a bit of research to see if the hoist have to comply to an Australian Standard. Then check if the Lift King units do. I always found 4 posts hoists where harder to carry out vehicle repairs on than a 2 poster but if you using it mainly for storage that would be a smaller concern. Wouldn't get too hung on a drip tray as they would be easy to make 3 trays that sat between the two ramps that could slide arround so they sit under engine diff and gearbox. The key thing are decent safety pawl locks. The things that go "click, click" as you take the hoist up. If it doesn't have a safety lock out it not worth owning. Ironicly of the two cars that I know that "fell off hoists" they where both on 4 posters but due to operator error in both cases.
As for quality I have not seen one in use so it a bit hard to say. I'm always a bit sus on Chinese made stuff as I had bad experiences with Chinese sourced componets and machines in the past. The other issue is wether they require 3 phase power or not?
I too would love a hoist as I am over lying on the floor on kreeper!

Anthony