jbrown430 :
verma1891 :
Do you need OS?
This build will kickass even at 4k-http://uk.pcpartpicker.com/p/2Ua2i
Yes, would the evo keep that cool and would it be worth it to sli two 780s to get a better case?
780ti performs very well in SLI.
With a single monitor setup up-to 2560x1440 just one card is enough.
With an Ultra HD monitor with a 3840x3160 let the SLI in. Also SLI is recommended for multi monitor setup.
Case is your personal choice. Choose any case that looks good to you and can be a shelter for those components.
For air cooling, the cooler master hyper 212 evo is best VFM. It will do well.
If you want water cooling, Corsair H100i is a good option.