Nikon is well known as one of the best maker of macro (micro) lenses. Auto focus is useless for close distance as you aproaching macro range (1:10-1:1). With time you will realize it. However some autofocus Nikkor are better optically that counter manual lens, so it is wise to get autofocus and use it as manual.
All Nikkor micro lenses are good buy. Take care for turning focusing barrel. It has to be long.
The best (optically) macro lenses are not up to 1:1 but up to 1:2. Get 1:2 and find a tube or additional lens for front part if you are looking for top quality.