One thing I remember reading somewhere (this thread perhaps?) was that I should get an accountant who practices in the same canton as I do, because cantons like it when forms are prepared by accountants in their districts. (And perhaps because accountants will be more likely to know canton-specific rules...). Eiken is in Aargau and i'm in Zurich - do you think this matters?

thanks for the suggestion in any case! I do definitely want to avoid expensive mediocre tax accountants...