Now I initially just linked this review of the JVC JX-S777 so I could run a picture of the thing—I have multiple-interface lust, for real. And while the JX-S777 isn’t the sort of thing that will be totally future-proof—it’s lack of DVI or HDMI HDTV interfaces pretty much guarantee that—if you work with a lot of composite and s-video sources, its ability to convert signals on the fly is pretty handy as both a video mixer or a home theater router. You can get something with a lot more capability, but probably not for $600.
That said, what’s the baddest of the asses in video switchers these days?
JVC JX-S777 Audio/Video Switcher [HomeTheater.About]