Yes actually you should replace the stock CPU cooler with a hyper 212 evo you can easily over clock the cpu to 4GHz. About the SSD your planning on adding, replace the OCZ Vertex 4 120GB with a A-Data SX900 128GB or the Kingston HyperX 3K 120GB
A Vertex 3 would probably actually be better too, but I'd have to look at some benchmarks. Also consider the Crucial M4 or Samsung 830. They both can keep up with the top of the line Sandforce drives, and they're known for better reliability.
I'm also not too sure about that PSU. I would get a more reputable brand like Corsair, Seasonic, Silverstone, Cooler Master, Enermax, or XFX.