125$ Here's the Rosewill Thor... http://www.newegg.com/Product/Product.aspx?Item=N82E16811147053
I specifically see metal screws for the cards in the screenshots. It's also cavernously huge for future hardware.
(rosewill is newegg's house brand, btw)
50$ A local friend has the destroyer... http://www.newegg.com/Product/Product.aspx?Item=N82E16811147144
and is perfectly happy with it. I _think_ it uses screws, though the photo isn't clear. perhaps a review somewhere can enlighten...
75$ 8 gigs of ram should be plenty for the next couple of years... and these are ddr3/1600 cas8 to boot... http://www.newegg.com/Product/Product.aspx?Item=N82E16820233147
plus s1155 is a dual channel setup.. you need two or four sticks of ram, your kit has three for an x58 based setup.
220$ cpu: skip... pricing is pretty much the same everywhere you go unless you find a sale. the 2500k is a perfectly solid choice.
alternate mobo (pci-e 3.0 capable for future upgrades, one dollar surcharge over your board)
no comment on your psu: can't find a review I trust for it. (basically, jonnyguru.com is my go-to for psu reviews.. he really tears them apart and puts them through the ringer)
lookin at roughly 600 with windoze and optical, and the destroyer case. add in psu of your choice *insert traditional warning about crappy psu's vs modern graphics cards here*, 250 or so for a quality unit, leaving 150 for drive(s).
Which will get you a 300 gig velociraptor , http://www.newegg.com/Product/Product.aspx?Item=N82E16822136929
, single platter for speed, natch, or you can stretch a bit and get http://www.newegg.com/Product/Product.aspx?Item=N82E16820220599
, which is above your stated goal of a grand at this point, although it's within 10% or so, and it will eat that velociraptor for breaksfast, spit out the chunks, and pee on them.
edit: barring that, you could at least get a black series drive, which will be noticeably snappier than the green drive, due to the increased spindle speed. Right now you're looking at building a tricked out ricer with the cpu, ram, mobo, etc... and then you're gonna use some spare donuts for the tires... :/