hi hun
confusing isn't it! I would suggest if you can before excel, try each treatment and discover which one you think would be best suited to your business. Alternatively you could wait for excel and have a demo nail of each product. However you would really need to come away and see how they perform first to get a real idea so you would miss out on any show offers this way.
As you have done so far already, research is the key. You will find loads of info on here and I'm sure geeks wouldn't mind you pming them for more advice about certain systems, thats what i did, and had some really interesting and helpful feedback. I was pretty sure i would use shellac, but i looked at all of the systems available before i made my final decision. I considered not only the products performance, but everything that went with it. So i looked at the following:
wearability
longevity
removal
care of natural nails
colour choice and options
what i could do with the products besides the norm ie rockstar, nail art, repair etc
information on the manufacturer/distributor
who and how they sold to techs
product and brand awareness
how well they advertised, marketed etc
training and support
who i could market or advertise this too
cost/profit ie what i could charge for the service, set up costs etc
who in my area was offering what already and what price
. . . And so on.
If you already have a client base, would your chosen system largely be of benefit to them all? Or are you looking to solely attract new clients? Asking your current client base is also a great place to start.
I personally love shellac, and when i compared the above information, it won hands down, but that's for my business. You might have different ideas, wants and needs for your own business.
Good luck hun and sorry if I've just thrown a load more questions at you lol, but explore every avenue as you are doing already, as this really is the best thing to do.
Hth x x x