Downconvert to SD to color and contrast check???

Just got a book on Friday that clams to be a comprehensive guide for the digital age of film making. So far I have learned quite a bit!

The book said that if you use a capture card that can down convert HD output to SD on the fly, you can use a NTSC/PAL broadcast monitor to accurately judge color and contrast.

I know the primary difference between a computer monitor and a tv/broadcast monitor is the type of input, RGB or YCbCr. It fits that judging color and contrast on a YCbCr device at 480x720 will be just as good as a YCbCr device at 720x1280 or 1080x1920. The book also says that the resolution can be checked on the computer monitor.

So, if this all correct, any recommendations on a NTSC broadcast monitor to use for color and contrast checking? I did see the JVC DT-V100CGU, it seems a reasonable price. So would that be a good broadcast monitor to pair with a Blackmagic Design DeckLink HD Extreme card?

Sam