I think it depends on where you work (rented room, own salon, home salon, spa etc)
Most beauty salons in town centres have a big name range to entice clients eg, Decleor, Dermalogica, Elemis etc I am kicking myself that I didn't spend more in the first place to get a well known range !
I would contact all the companies you are interested in for samples and price lists and take it from there depending on which ones you like.