GTX 780 is on par with GTX Titan but 780 is cheaper ... (release date for GTX 780 : May 23 2013)
i5 3570k @ 4.2GHz + Asrock Z77 Extreme 4 + GTX 650 + Seasonic S12II 620W + 2x4Gskill Ripjaws + Intel SSD 335 80GB .... = 800$
i7 3970X is not much better than i5 3570k since Dolphin doesn't care about Hyper Threading . You will have overclock both i7 and i5 anyway -> i5 is a better choice
Swap GTX 650 -> GTX 780 , we have 1500$ build
i5 3570k @ 4.2GHz + Asrock Z77 Extreme 4 + GTX 650 + Seasonic S12II 620W + 2x4Gskill Ripjaws + Intel SSD 335 80GB .... = 800$
i7 3970X is not much better than i5 3570k since Dolphin doesn't care about Hyper Threading . You will have overclock both i7 and i5 anyway -> i5 is a better choice
Swap GTX 650 -> GTX 780 , we have 1500$ build
Laptop:
Mini PC ::