I would agree with trying the solutions you get with your lens and go from there. I tend to change mine quite regularly depending on my mood and on any special offers going! If you collect store points, such as Tesco Boots etc then that is an advantage! Although i have used Post Optics myself, but more for eyedrops than solutions. Buying solutions online you need to add your optometrists details.
It depends on how you want to clean your lenses? Do you want a separate cleaner where you put a drop on your lens and clean it on your palm with a finger before rinsing it and placing it in the case with a conditioning solution, or do you want one where you put your lens in a case with solution and it cleans itself?
It is all down to personal choice and optometrists differ on this as well. I used to use an all in one cleaner where a little disc at the bottom of the case reacts with the solution and cleans your lens, but found that my lens wasn't as clean as manually cleaning it myself. However my twin sister swears by it and doesn't want to run the risk of breaking a lens, although with practice this is hardly a problem! Even totally drunk i can still manage to clean my lens though i can hardly stand up straight!! LOL!! This is NOT a reason to drink to excess though!!

LMAO!!!!!
See what solution you are given to start off with and take it from there. Everytime i get a new lens i'm given some little bottles to try which are dam handy! Just make sure that any cleaner you buy is the right one for your lens. Every cleaner will say on it whether you can use if for RGPs or soft lenses etc. I am very lucky in that i can use any solution and not get a reaction to it, but have read that some here do. So really it is trial and error!
Wishing you the best! Sweet X x X