I just saw this and came by to say I have flat feet and found my relief in Bauer Supremes (170s from a few years ago, just bought new 180s last week), and with a pair of Superfeet I've never felt better. Then I saw your last post... haha. If you never wear anything with arches, the Superfeet can make them sore for a while (as happened to me) but since it sounds like you do wear insoles in other shoes, you might not have any issues at all. If nothing else, maybe this will give you an extra vote of confidence pulling those S170s on...