I love using RCMA, Screenface, Grimas and above all Graftobain!
They are expensive brands, however with makeup you tend to get what you pay for and they do last as you only require small amounts of product when using them, the results are flawless and long lasting which my clients love.
MAC are a good 'high street brand' to use, if you are looking for a well known brand to use on your clients.
I'm not a big MAC fan myself, however they do offer a PRO card discount scheme which makes their products more afordable for makeup artists or beauty therapists who want to buy multipul items from them
and its a brand that your client will know/trust
There is a charge for the pro card, however when i tried out MACs products after getting a pro card, I managed to cover the cost of the pro card in what I saved in discount on my 1st order!
So if you are ordering from them often you will def feel the benefits and recoop the cost of the card many times over.
HTH
Natalie