Have you tried the Testor 'Model Master' range of enamels Geek?
The vast majority of my paint collection is Humbrol Enamel with Tamiya Enamel coming second as you can see, but eventually I hope to replace them with Model Master paints.
Model Master paints have a massive range of authentic colours and are excellent quality paints, even better quality than that of Humbrol or Tamiya.
Cheers,
Dave