I have the Badger 105F (F for fine needle) and the Iwata Eclipse
HP-CS. They both have the drop-in self-centered type nozzle which makes
them easy to clean. I don't see one over the other in this regard.
The difference is in the feel and control of the airbrush. The Iwata
is quite a bit heavier. The biggest difference is the control of the
trigger. Iwata has a long taper needle which gives the control a long
and gentle stroke. The Badger has a short taper and double cone needle
which allows quick release of paint to cover a larger area quicker. The
badger is also more tolerant of paint thinning due to the larger nozzle
tip. With the Iwata, you will have to thin the paint more and use light,
misty spray in multiple layer to get the same solid coating.
Personally, I prefer the Iwata type control and feel. Besides, I can
get replacement parts for the Iwata locally at Hobby Lobby at very good
price.
But I also know some modeler on this forum prefer the Badger type trigger control.
For a little more money (~$200), you may consider a Harder & Steenbeck Evolution 2-in-1. You can find a lot of video on H&S at Youtube. I feel that those by Phil Flory are pretty good. Here is one of his basic. Phil uses a Harder & Steenbeck Evolution 2-in-1, which has a pretty tiny 0.2 or o.4 mm nozzle.
Both the Iwata and H&S trigger feels silky smooth and is a joy to use.