My two cents: nothing wrong with a two- or three-patch pockets coat for a three-piece suit, but I would get regular welted pockets for the vest, especially if the cloth is worsted (actually, I think patch pockets look wrong on most worsteds anyway, coats included, but that's probably just me). Mind you, there is a picture of a patch ticket pocket in that old anglomania thread (remember? It's on a blueish tweed coat), and it looks rather neat, if slightly affected. So small patch pockets can look good even when prominently displayed. But it's certainly a risky move. EDIT: I see it's a Donny. In that case patch pockets would look good even if it's a worsted tweed, of course. Not that I like worsted tweeds, but still.