this comes out to 599.92$ after MIR's and before shipping. i can change things up a bit though. i linked the 555 over the 635 just as a choice, as if you unlock it, its better, but personally, id go with the x3 440.
personally, for gaming, id go with the x3 440 over most things. Most games dont use 4 cores, but some do use 3 cores. Also, it gives you the unlocking possibility of the 555, as you can unlock it into a athlon quad core fairly easily, and you even have the possibility to unlock it into a x4 945, however that isnt as likely. Its also cheaper than everything.