For standards The Grace in Rose Bank takes some beating. Tad expensive and an hour from JNB though.
If you fancy somewhere close to JNB but not your standard airport hotel which we all get pretty bored with try The Airport Game Lodge. 10 mins from JNB but away from the flight path. Very nice large rooms set around a garden with swimming pool. Ponds, stream, large paddock with various game. Excellent breakfast. Now the down side - no bar
There is a very temperamental drinks vending machine which even the staff can't get into. No meals apart from breakfast either. However they will take you to a place 5 mins away which has a bar and excellent restaurant. Oh, also the admin is pretty haphazard. Despite all of this for a one night stop over it is now our choice.
