If you can't trust your monitor, then you're missing half the point. The Scopes tell you if you're legal or not, and give you some great information on the image overall.
But the final look of the image is determined by the artist and the only way the artist can know for sure what the image looks like, is to see the image on a proper monitor. This is why we have Flanders Scientific monitors in ever single edit suite in our shop. They cost more, but when the editor and / or client are in the room looking at the monitors, they know exactly what that image looks like.
Especially for dialing in two cameras that may not look alike. You really need a good reference monitor in order to know for sure if you've got them as close as they can be.
Walter Biscardi, Jr.
Biscardi Creative Media
biscardicreative.com