How important is the wheelset in a road bike?

I would like to buy a new road racing bike,should I invest in a good (expensive) wheelset although this would mean that I will have to spend less on other parts (besides the frame). Is there a different, beside weight, between a normal price wheelset and an expensive one. I noticed that some expensive wheelsets... show more I would like to buy a new road racing bike,should I invest in a good (expensive) wheelset although this would mean that I will have to spend less on other parts (besides the frame).
Is there a different, beside weight, between a normal price wheelset and an expensive one. I noticed that some expensive wheelsets are only around 200g lighter.Besides speed and weight, the quality of ride is also important to me.
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