http://www.blackmagic-design.com/products/intensity/Does SD and HD analog capture and looks great. I had pretty low latency with them as well. Plus, multiple ones can be installed in a MacPro.
I used a lot of industrial cams at one point and gave them up because they looked awful compared to very cheap consumer gear. The equivalent of a $600 HDV cam and Blackmagic Intensity in the IIDC world would cost at least 10x. And there is no IIDC cam that would even approach the image of what a Canon 5d into the Intensity would give you.