Pure Cafe is formulated to froth better, but I really think standard full cream of Pura/Pauls/Generic is as good a place to start.
Youve got a machine that is capable, its just technique now.
I use home brand Coles/Woolworths on my Expobar and it does the job for me.
I still get some that are too thick or thin, but most of the time, it is ME and not the milk.
It just takes practice and consistency. I get the best results when I manage to get the jug position correct straight away. IE: Very little movement once the steam wand is in. Let the steam do its job and you can end up with lovely, glossy microfoam.