I'd say do this, kind of a mix between the two, same mobo + CPU, cooler for OC, better PSU, similar (solid) case, HD7870 for better general gaming performance, could be switched for 660 if it performs better in the games you play.
I didnt have an aftermarket cooler because I would rather have a better gpu. But i guess it makes sense to get a aftermarket cpu cooler for an overclockable cpu
I have the same 7850 you listed in your intel build and I can sell you it for a 150 bucks. It has everything that came with the box and has been barely used!
See i would, but im building this around christmas time and if I dont get all A's this thing aint gonna happen so unless you dont sell it for a long time sorry i cant help you
If you pay an insane about for hydro where you live, or you live in a trailer or something with limited power, that is something to consider, if not, aim for performance per dollar, not performance per watt.