Sorry about the delayed response, I'll hopefully answer everyone's questions here:
Dekker3D: You should look into setting variables on your miners, so they can all use the same profiles and/or config files, but each can be customized. More information on variables can be found here:
http://manotechnology.blogspot.com/2013/08/web-config-files.html. Let me know if you have any questions.
mb0erman: It looks like you're setting the same values for all three GPUs, but one of them doesn't like these settings. It may be the voltage as Tigggger said. You can set individual values for each card by separating them with commas. Example setting three GPU clock speeds to three different values:
--gpu-engine "1500,1400,1300"
burgergold: It looks like Tigggger answered this one too, but you would put those in a batch file. Then in Profile Manager, instead of selecting the executable (.exe) miner file for "Miner Path", you select the batch file.
bouncemeister, Chillance: Tigggger answered this too. There is a new setting in the latest version of CGWatcher to kill the miner when restarting it, as opposed to shutting it down (which restores clock speeds and voltages to original values). This means the voltage should stay the same through the restart. Other than the ability for the user to change voltage manually in the Devices tab, CGWatcher does not make any changes to voltage.
Uniphase21: You should not need dummy plugs. CGMiner and CGWatcher should detect all GPUs, whether they have a monitor plugged into them or not. However, Windows and CCC may only show GPUs that monitors are plugged into. Fortunately, CGMiner and CGWatcher don't care what Windows thinks.
Chillance: The "best price" is provided by your selected coin data provider (coinchoose or coinwarz). If the data in CGWatcher consistently does not match the data on your provider's website, please let me know. Because this information changes often, they may occasionally not match. But if you refresh coin data at the same time you check the website, they should show the same values.
Tigggger: Thanks for the help.