IMac external display problem

Hi,
I have a spare 22" 1080p tv sitting around so I tried to set it up as an external display for my 21.5" iMac.  I was able to get it working (MDP to HDMI) but the resolution and color is not so great, and when I look at the external display in System Profiler it says something about it being a tv (which it is).  My question is can I do anything better than what I have experienced so far?  Thanks for the help,
rc
Note - I also tried running the Color Profile app that appears on the external display and while it did improve it some once I clicked on save it never seemed to stick...

Go to: System Preferences > Displays select the Color tab > uncheck "Show profiles for this display only" and try one of the RGB profiles to see if it is better for you.
Then if you are not happy with one of those..? Try Selecting, Calibrating and Saving a different Profile, other than the default one offered for that monitor.

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