FCP's Canvas will mask issues with footage that you will not see unless you're connected to a high quality reference monitor. A consumer TV is set to mask noise and can also mask out issues with original footage from time to time.
We replaced all of our old CRT reference monitors with Flanders Scientific for this very reason. They do not mask noise, they show all interlacing correctly (which is important for reverse interlace issues) and they show all hits, nicks and errors with footage.
We run the 17", 23" and 24" monitors in our shop, in every suite.
flandersscientific.com
Walter Biscardi, Jr.
Biscardi Creative Media
biscardicreative.com