Most z87s of decent brands and price range fully support the new haswell processors that's why I got my z87. It was just $30 usd after rebates for a z87-gd65 (just got the rebate Friday)
Edit: Something like this build should easily do dolphin in 1080p for nearly every game and be fairly balanced for other pc games too. ( it could be improved this is just a baseline estimate build (you could go cheaper) )
http://pcpartpicker.com/p/8bbft6
Edit: Something like this build should easily do dolphin in 1080p for nearly every game and be fairly balanced for other pc games too. ( it could be improved this is just a baseline estimate build (you could go cheaper) )
http://pcpartpicker.com/p/8bbft6