My opinions going down the list:
Get the 2600k, I know you don't see the benefit to overclocking but there is one (ask your brother). And even if you/your brother never overclock it, having the ability to will increase the resale value when/if you plan on selling your computer.
I'd go for the Asus P8Z68-V, the only difference I can see between the basic and PRO version you looked at is the PRO has 2 more SATA 6GB/s ports.
I'm with Jason on the 1600MHz, grab this 8GB G.Skill Ripjaws X 1600MHz
(the picture is wrong).
Again I'm with Jason, get an OCZ Fatal1ty 550w
or ModXStream Pro 600w
If it is just for storage then it doesn't matter if its green. But, if you plan on running any programs off of it then I would get a faster drive.
You'll want a SATA III drive since they are quite a bit faster 60GB OCZ Agility 3
. Or, if you can swing it, get the 120GB version (about $210) that way you'll be sure you can keep all your programs on the SSD and leave the hard drive for storage.
The rest looks fine.
Also check out the The Hardware Shopping MegaThread
, might be able to shop around different retailers and get a better deal.