Some magazines because of the crappy paper you really just have to use filters if you want to get it out at a decent speed. But there are better magazines were you don't even need filters to clean the raw because the dust is so easy to clean on it. I usually just base it on the type of raw it is and if I want to clean it with or without filters.
indeed topaz saves a lot of time.. that's why fast-scanlators use it.. i've seen a lot of cr-p with it... people still have to improve their eyes and get the best result as they want to.
vic: we all know you do bleach in HQ :3