I call Campagnolo the "Mercedes of bike parts". I'm not sure if I heard it somewhere before, but it fits. My GF is all about campy. She's not a brand freak about anything else (including non-bike stuff).
I say, if it makes you like your bike more, or if it makes you feel faster, then I'm all for you having it. If you are buying it to impress others, then don't bother because your job will never be done as you will *always* have to do more to impress others. This is why you see $3,000+ Mavic IOs on street fixies.
I have Chorus 10 on my road bike and I'd trade it for Ultegra or DA 10 in a heartbeat. But, I'm a Shimano fan like that.