No dead pixel warrenty: the only thing I can find about it on CTX's website is here click here where it seems to consist of a "zero dead pixels" image. Hidden out of the way somewhere (google found it), they say:
Almost all LCDs available will have the possibility of a few dead pixels when they are manufactured. A CTX LCD monitor with this feature is guaranteed to have absolutely zero dead pixels upon purchase. This means that the CTX monitor is rated an ISO13406-2 LCD and has a screen that will be free of unsightly dead pixels.
This was in the description of a different monitor. However, looking at the section about your monitor click here it doesn't seem to say anything about dead pixels, so it doesn't look like yours is coverted by that.
I'm afraid I don't know much about 19" TFTs; my knowledge's limited to 17" and 15", so I can't help with your other question.