The gpu is definitely the weak link in that system. What resolution are you running?
The psu is an older model OCZ and iffy. I would suggest a better quality 500-550w psu. I recommend one of these.
http://www.dabs.com/products/xfx-550-watt-core-edition-full-wired-80--bronze-psu-7NSW.html?refs=55420000&src=3 5yr warranty
http://www.dabs.com/products/antec-520w-high-current-gamer-80plus-bronze-psu-7QST.html?refs=55420000&src=3 3yr warranty
For a DVD-RW, go for whatever is cheapest. Lite-on, LG, Asus, Sony or Samsung.
You don't need an anti-static band. Just don't work on carpet and don't walk across carpet when working on it.
Always touch the case or power supply before touching each component to discharge any static. Handle your components by the edges, meaning don't touch the chips, capacitors, traces, etc.
Lay any components your about to install or just uninstalled on a anti-static bag, don't just set it on the counter. The mobo bag or video card anti-static bag is good.
The case is decent, also consider the Antec 302.