In theory no, but I've seen it can happen. I had a server with an old ATI mach64 video card and if I hooked up a newer 17" LCD it looked like crap, but if I used an older LCD it was ok.
But that's probably pretty rare. If in doubt, buy from somewhere that lets you return them if you really don't like it.
You have to look at your monitor day in and day out, don't settle for something you aren't happy with.
EDIT: It might also be an issue with games; LCDs look worse if you run them at a non-native resolution. 1280x1024 is pretty standard for 17" and 19" LCD's so if you play games at a lower resolution than that it will "stretch" the image to fit, making it look fuzzy. Again one of those things you have to try to see if it really bothers you or not. Some people don't notice it until you point it out, some can't stand it.
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Uncertainty is an uncomfortable position.
But certainty is an absurd one.
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