Shimano RS80 C50 wheelset

I'm looking to buy a set of carbon clinchers over the winter. I was saving for some Mavic Cosmic Carbon SL, however, I see that Planet X are doing Shimano RS80 C50 sets for £499.

I saw the Shimanos in the flesh yesterday and they look well made but the new graphics in silver are a little questionable IMHO. Does anyone have experience of these wheels? Are the Mavics a better wheel and worth the extra cash?

I would appreciate your thoughts.

We've long held Shimano's shallow-section RS80s to be one of the better mid-range standard wheelsets on the market, so were keen to get our hands on these deep section C50 hoops to see if they measure up. And they do, pretty much: they're well made, fast at speed and good-looking. Only the weight lets them down.