To be honest I'd say 3 cores was where it's at right now, as having 1 extra core helps with core-optimised programs, but the higher clock speeds with 3 cores (compared to 4) gives better game performance, similar to that with dual-cores.
Not to mention it's excellent value. If I was building a PC right now I'd go for the Phenom II X3.
I'm a student, any money I might possibly have is not mine.
+REP ME FOR BEING WONDERFUL