The E2180 will overclock just as high and it's cheaper. It's still my choice. If you're overclocking then you'll need an aftermarket CPU cooler.
You want the functions of the HDDs exactly the opposite. Storage disks can be slower, applications, the OS, and your games should be on the fast one. Do yourself a favor and get a pair of Seagate 7200.10 250 GB disks. They're very fast and are an excellent value.