Pretty broad Em. Brings to mind an interesting anecdote.
The ex-prez of my club is a highly accomplished modeller...you might recall I posted a pic of his Albatros DV. His wood grain technique blew my tiny little mind. He came to the club one meeting with this little airbrush in his hand. He said he'd bought it at the local auto accessories shop...there's a big chain called 'Super Cheap Auto'. He also said it was a Chinese 'knock-off' (copy) of a Badger brush and had cost him fifty bucks which is cheap for an airbrush. The last statement he made sold me. He said it was the best airbrush he'd ever used. From him, that's quite an endorsement. Expensive doesn't always equate to 'better'. Whatever works mate.