Just bid on a whim and ended up purchasing a solid black Corneliani vest off ebay. It's a 6 button vest made out of a slightly thick cotton weave, though it's definitely not a sweater vest. I'll probably wear it to formal events with my single breasted dinner jacket, but it's a neat piece and I'm trying to find other uses for it. I don't think it would work with any of my suits, but I'm also worried about looking like a blackjack dealer or a cowboy if I tried it casually. Any suggestions?