Hiya Matt
Personally I use an Iwata Kustom CS, been using it for over a year now with no problems
If you were to look towards a new airbrush go with a .35 needle & nozzle.
I use devilbiss guns for smart repairs, again good quality and never have had issues - Just never used any of their airbrushes.
If you were to go Devilbiss or Iwata, the initial outlay is steep but see it as more an investment. Another set of brushes to look at are the badger renegade brushes.
MikeP