From my experience, I have 3 airbrushes acquired at different occasion with different moods. I fully admit that I don't need 3, but got my bonus and couldn't resist, this is also what our hobby is made of!
I have a Taiwanese airbrush, really cheap, working well for base coat, spare parts are cheap, and living in china makes the replacement receive almost within the day... So no problem, a needle cost me 3USD...
Then I bought a Mr Hobby PS270 0.2mm double action airbrush, excellent quality built, japanese quality... I like the valve which can be adjusted for airflow without touching the compressor. Easy to clean, and really precise, if paint is diluted correctly, I follow a recipe mixing some enamel thinner, water, vallejo airbrush thinner, it works almost flawlessly since then with all the paints I have (GW old and new, Vallejo Model color, Vallejo air)
Then I bought a harder and steinbeck, Evolution 2in1 0.2mm and 0.4mm, I would say, wouaah, quality wise is really amazing, then I miss one thing is the valve for adjusting the pressure. I know that they have an accessory but quite expensive, then I have a humidity trap, I have the thread adapter, plus the hose, if I add the valve it will be even longer and difficult to handle... The control of the paint flow is amazing and really like the balance and the feeling of this airbrush.
One day I saw online that airbrush shouldn't be purchased according to the experience but according to the application. A cheap airbrush can be frustrating at the beginning, but an expensive one where the needle is bent can be raging... I understand people who want to start with a cheap airbrush knowing its limits and gaining experiences especially in the cleaning process and basic manipulation, I did it myself... Then switch to a better one...