I am working on a live stream setup and need help identifying a good video capture device for my situation. I am building a computer with a Haswell i7, 16gb of ram, and probably an R7-370 to run video out to multiple screens. I have two handheld HDMI cameras and one SDI camera that I would like to be able to switch between. I will be using Wirecast and Youtube for the live stream. Can anyone give me a good suggestion for a capture card that can accommodate the three cameras. I prefer to stay in the $500 or less range due to a limited budget. Any suggestions?