Aerborn aerolite is exactly the same as Prolite, except slightly cheaper and the shims are different thicknesses and sizes so you can produce a gradual effect rather than a 'step'. I've used both and the the aerolite is a neater fit than a prolite which is huge.
Also using a Le Mieux pro sorb at the mo which has frot and back pockets for risers.
I like the Le Meiux Pro-Sorb as you can put the riser pads wherever you like in whatever thickness, so its really quick to adjust. Plus if you no longer need to alter anything you can just use it like a normal fluffy, so worth the money.