This post was inspired by the "Camera Bling!?" thread from a few days ago. This time, the question is "What piece of serious, but mostly useless, and probably very expensive camera gear would you own, if money was no object? I'm not asking about things like gold-plated Nikon FA bodies, this is not about flashy stuff but serious tools that only a photographer would love. Mine would be an underwater housing for, say, my F100. I don't dive, but it would be nice to have one. And I might even use it once or twice... My fiance would be very unhappy if I bought one (unless I was also buying SCUBA gear).