Use the component out of your HVX. I've had bad luck with passive splitters (signal is just a hair darker than it should be), but active splitters work well. I have some no name one from Amazon I picked up for around $100 that splits component video and stere audio into 4 channels. Handles HD great with no loss at all.
Alot of broadcast monitors also have a signal pass thru. If you have this on one of your monitors just use it to pass to the second monitor.