GW/Briess/Rahr, they're all good malts in my book and each with a forte. GW is the most husky tasting (not a bad thing, just a thing); Briess is the most flavorless (again, a great choice when you want the malt to sit quietly in the back of the room); Rahr is neither husky, nor flavorless, but maybe sweet and plain. Malteurop is pretty variable in terms of quality - I've had good quality bags and terrible quality bags (small kernels, super-husky). Just my opinion of course.