I find if you ask your clients what brands they have heard of they can only think of st tropez and fake bake. Its not about how much PR a company has its whether or not your clients like the solution you use.
There are not really many spray tan manufacturers and you will find a lot of brands are the same product as other leaders just re-branded. I know one UK manufacturer makes tans for about 10 UK tan solution comapanies!
If the products good, and your clients are happy you don't need to change it because you feel its not a market leader, all brands started off unknown including fake bake.
If you want tan solutions that are better or do specific things etc then its easier to recommend brands. Every one has there favourites and today they are all mostly all pretty good.
When looking for a brand I think its important to look for something different from your competitors. Why sell one brand that your competitor uses and under cuts you on! I prefer to use brands few others use, as your client becomes addicted to this and unless she is unhappy with the product they stay with you. if they see your competitors using the same tan and you cannot fit them in when they want, or that competitor is cheaper you lose them!
Instead look for things about your product that promotes it. how many ingrediants do they have in them, less than 15 is usually great as it is less likely to irritate the skin (I have eczema and tried everything, the less ingrediants it has the less my skin flairs up). Check to see if it contains parabens, alcohol, mineral oils and perfume and if it dosn;t promote it. clients are so concerned today about their skin health that they seek out the safest product possible.
Best thing to do is call all the companies, get samples and ingredient lists as well as the benefits to you using their product and try them out on your harshest critics ~ your clients. That way you won't make any expensive mistakes!