Good choice on the cooler. It's cheap and the ones that are better are also 2+ times the price (give or take a fiver).
Case is good, I have the 912 model.
I think you are overpaying on the PSU; that said, I do not know what a better one would be.A better price
for the hard drive. It's not the same model or manufacturer, but it's just as good.A better
DVD burner, for cheaper. Plus, you get some money off of media for the drive.
Instead of a free Intel Robots t-shirt, you can get 20$ off Here, with a promo code.
Unless, of course, you really really want that T-shirt.
We can do better on the motherboard, but I have no idea where and what board to replace it with.
We can also do better on the keyboard. That one will NOT really feel like a mechanical one. It also doesn't have very good key rollover (at least in my experience). Spring for a Das Keyboard
or the slightly cheaper but still good Razer BlackWidow.
The BlackWidow has macro buttons, and is a bit lighter. It also doesn't look as cool as hammering out your words on a blank keyboard
For the RAM, use these G.Skill DIMMs.
Get the EVGA SC 560ti
. It's a bit cheaper, just as high performing, and has a good warranty.
The 11$ mouse will fail you. I guarantee it. If you budget allows (or later on), get a Razer Deathadder.
They are solid, not overly spendy, and last a long time. I think (not sure) that they also have a lifetime warranty.