Hi !!!
To be honest you cannot strike a balance between the real paintings and modeller's enamels tonality.You should remember that real colours tonality has been changing during the time of aircrafts usage.It dependes on the weather conditions,quality etc.If you want to paint a model that would look like the real a/c, you should remember about this.
There are some of enamels that you can use.One of the best paintings producers are Gunze Sangyo,Xtracolor and Tamiya.Of course you ca find others firms that offer both oil and acrylic paintings Testors,Aeromaster,Lifecolor and Pactra for instance.What paintings you'll choose it depends on you only.The Humbrol enamels are still avialable and it is a good choice for those who cannot afford others paintings.I hope the list of the enamels helped.
regards,