Advise on a new build

[dumdum]

Hi there. My brother needs a new computer and i will build it for him.

I did like a rough pick of each necessary parts but i need more research before choosing any.

So far these are the parts i've picked

but i accidently forgot to put a power supply. lol?



*you may have to click the image and click one again if a window pops out.


I'm trying to get the grand total to be under 800 dollars.

My brother basically needs a mid range computer.

If you look at my sig, it would be sort of like that in a way except the only difference is that mine is 2-3 years older. Basically, all new tech (core i's, GTX 500's, usb 3.0, pci-e 2.0 etc) but with mid range prices.

I think the case is way too expensive but i want his computer not to overheat and last long. That has been the problem for long time. I'm guessing a full tower will allow air flow to be better.

I need some advise for each parts or perhaps a full build if you would like to recommend one. =]