worth it or not depend the ratio of performance gained and money paid ..

for example 8800GTS series got few nice OC model ..those really worth money ... additional 10% increment for the same amount of money paid as well ..

but not all OC version worth the money paid ...

Too bad no manufacturer that willing just to sell their card without any bundle ... it would cut down lots of cost and make gc much more worth of purchase for us as consumer .... hahahah