$210¼ -15MIR or
$200 Silverstone Sugo SG08 mini-ITX case
This small (14.8 liter) mini-ITX case accepts dual-slot gaming graphics cards up to 12.2" long. It includes an 80+ bronze power supply rated at 46 A on the +12 V rail and a huge 180mm AP181 fan. There are a couple of USB 3.0 ports on the front. You won't find better cooling in a Mini-ITX case.
Select a graphics card with a "blower" style cooler like this 10½" long
GeForce GTX780, this 10.6" long
GeForce GTX770, this 11½" long
Radeon HD7970 or this 11.6" long
Radeon HD7950 for $219 so that the air intake matches up with the dedicated holes and the included filter. With this type of graphics card cooler, nearly all of the heat from the GPU is exhausted out of the card slot without affecting the motherboard or CPU. Note that AMD's next-generation Hawaii GPUs are due in October, so you may want to soldier on with your existing graphics card for a couple more months until the new hotness is available.
$165 ASRock Z87E-ITX mini-ITX LGA1150 motherboard
This motherboard includes an Intel i217V NIC, Realtek ALC1150 audio, a half mini-PCIe slot with an included 802.11ac WiFi/Bluetooth 4.0 module and a another available mini-PCIe slot.
$115 2x8 GiB PC3-12800 Crucial BLS2K8G3D1609ES2LX0 (DDR3-1600, CAS 9, 1.35 V, low profile)
Here's some good RAM for your SFF PC build.
$135 3.0 TB Seagate ST3000DM001 Barracuda 7200.14
Western Digital's Caviar Black drives haven't been price-competitive with Seagate's offerings since the floods in the Fall of 2011. Since your case can hold only one internal 3½" hard-drive, you might as well make it a decently-sized one.
Slim-line optical drives aren't too hard to find and they won't break the bank. These laptop-oriented drives do tend to be a bit slower than regular half-height drives.
$59 or
$98 Slim SATA tray-load Blu-ray burner
or $148 Slim SATA slot-load Blu-ray burner
or $29 Slim SATA tray-load DVD burner
or $69½ Slim SATA slot-load DVD burner
$8½ or
$6½ or
$8 Slim SATA to desktop SATA data+power adapter
Carefully follow Silverstone's included assembly instructions. The order of assembly matters!
Here's a video review:
http://www.youtube.com/watch?v=lhGcipEyIK8This one has excellent video of the SG08's features, but it lacks English sub-titles:
http://www.youtube.com/watch?v=RhjOFhZs79MHere's Newegg TV's Paul showing the highlights of a similar older Sugo SG07 model:
http://www.youtube.com/watch?v=GXXMNucladEP.S.: I used my SBA forum moderator powers to update your thread title.