Is there some non-gaming reason you need the 8 core cpu? I think an i3 3220 should do better for you, and it gives you $30 back into your budget.
The Corsair tx650 is on sale now on newegg, so I'd sink an extra $10 into that since I really trust their PSUs. Maybe you can put the remaining $20 to work in some better memory. Or up your budget a tiny bit skip the corsair psu and try to get a SSD into the mix.