I have Sli'd my classified K with (2) hydro copper GTX 980ti classifieds, but should I step up to the Classified motherboard to get the 2x16 speed or stick with the 2x8 speed?

No, do not spend the extra money. The classified runs x16 through a plx, and you have to have the cards very close together for it to work. X16 barely provides any difference, maybe 3 or 4 fps, so there is no reason to spend the extra money.

Stick with what you have, as x8 runs just fine with 2 way sli.

ok, thanks. I had to run my cards real close on my P67, I also have to run them real close on the Classified K in order to get the second card in an X8 slot. Fortunately I am watercooled, so the proximity of the cards with one another doesn't really matter.

Ok, with watercooling, that definitely wouldn't be a worry. The Classified K will serve you very well though, so I definitely wouldn't make the change

That is very clean looking. I won't lie, the drain on the bottom card did throw me off for a second, lol.

 

Yeah, I can just turn the drain towards the front of my case and into a bucket and it drains the entire loop, I practically had the same setup for my 2x580's, and 2x680 classy's and has worked well for me.
 
thanks for the compliment

I just realized to changed the SLI bridge color, I REALLY like that! That part looks really good.

Really sharp build! 

all I'm about to tear it back down and hard pipe it and do some general clean up, this was a slap together to get Win 10 and the new build to play nice before performing some final touches.
 
thanks for the compliments.

I'm thinking about getting rid of both of these puppies, if anyone is interested pm me.