I hadn't seen mexpedip's post yet. It proves my point. You end up paying $168 and $170 for a second hand MB and a second hand and also obsolete GPU. Hint, never ever buy second-hand MB and GPUs. You risk getting junk that others have overclocked until it fried and then returned it. Also, that GTX 260 is kind of old and weak, compared to what else is available: GTX 285, HD 4890, etc.
I suggest you buy a GA-EP45-UD3P and a HD 4890 and an E8400. All new, of course. If you prefer nVidia, an eVGA 750i and a GTX 275 (or GTX 285), and again E8400.
Get the Corsair 750W, not the Rosewill 750W. Much safer.