Any of the good double-action airbrushes will suit your needs.
I recommend you look at the Thayer & Chandler Omni and Vega series, The Badger Anthem, and the Iwata Eclipse.
These are all very well made and will do all you need for models.
Mike
“Wisdom is the right use of knowledge. To know is not
to be wise. Many men know a great deal, and are all the greater fools
for it. There is no fool so great a fool as a knowing fool. But to know
how to use knowledge is to have wisdom. " Charles Spurgeon