Atkinson's in Canada gives forum member 10% off on Plissons if you ask for it and tell them you're a member. Rooney Finest is a great brush if you like them a bit scrubby and prickly. I haven't tried any of the Simpson brushes since Vulfix took them over but I read good things about them. The pre Vulfix Supers live up to the name.

IME Plisson HMW is sort of hit and miss. I have a two band that is prickly and firm and a three band that is soft like a Kent. I would probably go for the Rooney Finest. If I went Plisson I have found the European White to be a fine brush and more reasonably priced than the High Mountain White but as good in quality.