Ref 780ti and 780ti classy in sli

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What are people's thoughts on a ref 780ti and then a 780ti classified in sli. Reasoning behind this is I could only get a ref card when I decided to upgrade from my 780. But I would like to own another classy as they seem to be best for overclocking next to the kinpin. So would like all your thoughts on this

 

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Those were my thoughts would love the KP but just don't think I can justify it since I would like to go tri sli soon but need to fist build my x79 system

 

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I am currently building a rive be and 4930k system

 

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There is one thing that is going to annoy me the water blocks will not match