Those are standalone monitors. You'd be tethered to them (there's a way to make this wireless if you have the cash and patience) and it'll restrict your movements quite a bit.
A better option might be a
mountable monitor like these:
http://www.bhphotovideo.com/c/produc...untabl e.html
or
http://www.bhphotovideo.com/bnh/cont...t=Submit+Query
NOTE: before you buy any of those make sure it'll work with your camera.