I'm not a great modeller & have only just got into airbrushing but I bought a compressor similar to Frank's with a tank for about $100 more, plus I bought an Iwata Neo (3.5mm???) double-action & a Badger (
) single-action airbrush.
Haven't used the Badger, yet, because it has a smaller fitting, so I need to buy a 1/4-to-1/8 adaptor (I think ... It may be 1/8-to-3/16)
So far I'm impressed with the Iwata - but I need some practice!
Iwata & Badger are both well respected brands & have a wide range of airbrushes over a fair price range.
Many good airbrush artists (including modellers) use really fine nozzles (1.5mm, etc) but the brushes tend to get expensive when you get into that range ($1500+).
I'd suggest that the compressor, at this stage, is the most important buy. It needs to be oil-less, have a pressure regulator & a moisture trap &, preferably, a tank.
THIS is the one I bought.