+1 for the 2500K. I stuck a 2600K in this build, but as others have pointed out...the 2500K would be the way to go for your needs.
Here's something to give you a few idea's to look at. Those cases down below just showed up on newegg a few days ago and they come with everything but the kitchen sink. From multiple fan controllers, to dust filters, to front USB 3.0 ports, not to mention they have excellent cooling/ventilation.
This build down below includes a 2600K combo'd with Windows 7, a gtx 580 with the option to add another one for SLI, 128GB SATA 3 SSD, after market h/s, etc...
http://www.newegg.com/Product/Product.aspx?Item=N82E16811139009 $129.99 - $114.99 after mail-in rebate card FREE SHIPPING
Corsair Carbide Series 500R Black Steel structure with molded ABS plastic accent pieces ATX Mid Tower Computer Case
or that same case but in white....
http://www.newegg.com/Product/Product.aspx?Item=N82E16811139010 $129.99 - $114.99 after mail-in rebate card FREE SHIPPING
Corsair Carbide Series 500R White Steel structure with molded ABS plastic accent pieces ATX Mid Tower Computer Case
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.732099 $683.98 FREE SHIPPING
CORSAIR Professional Series HX1050 1050W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS SILVER Certified Modular Power Supply
MSI N580GTX Twin Frozr II/OC GeForce GTX 580 (Fermi) 1536MB 384-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157269 $279.99
ASRock Z68 Extreme7 Gen3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.723044 $399.98 FREE SHIPPING
Microsoft Windows 7 Home Premium SP1 64-bit - OEM
Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor BX80623I72600K
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065 $27.99 FREE SHIPPING
COOLER MASTER Hyper 212 Plus RR-B10-212P-G1 "Heatpipe Direct Contact" Long Life Sleeve 120mm CPU Cooler Compatible Intel Core i5 & Intel Core i7
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.696126 $68.48
$5 off w/ promo code EMCKAHH23, ends 9/28
LITE-ON DVD Burner - Bulk Black SATA Model iHAS124-04 - OEM
Seagate Barracuda ST31000524AS 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
http://www.newegg.com/Product/Product.aspx?Item=N82E16820148442 $196.99 FREE SHIPPIN
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)
Total: $1,787.41 *not including shipping and rebates
These boards require low voltage RAM as in 1.5v or less. Here's some good 1.5v RAM to check out....
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233186 $52.99 FREE SHIPPING
CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Profile Desktop Memory Model CML8GX3M2A1600C9
or...
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428 $51.99 FREE SHIPPING
G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBXL
or...
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314 $51.99 FREE SHIPPING
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBRL
or...
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226191 $54.99 FREE SHIPPING
Mushkin Enhanced Blackline 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model 996995
or...
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226219 $53.99 FREE SHIPPING
Mushkin Enhanced Radioactive 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model 997005
These monitors down below are 3D capable and have a 120HZ refresh rate.
http://www.newegg.com/Product/Product.aspx?Item=N82E16824001475 $469.99
SAMSUNG S23A750D Black 23" 2ms Full HD 3D LED BackLight LCD Monitor 250 cd/m2 DCR 1,000,000:1 (1,000:1)
http://www.newegg.com/Product/Product.aspx?Item=N82E16824001473 $579.99
SAMSUNG S23A950D Black 23" 2ms Full HD 3D LED BackLight LCD Monitor 250 cd/m2 DCR 1,000,000:1 (1,000:1)
http://www.newegg.com/Product/Product.aspx?Item=N82E16824001474 $599.99
SAMSUNG S27A750D Black 27" 2ms Full HD 3D LED BackLight LCD Monitor 300 cd/m2 DCR 1,000,000:1 (1,000:1
http://www.newegg.com/Product/Product.aspx?Item=N82E16824001472 $699.99
SAMSUNG S27A950D Black 27" 2ms Full HD 3D LED BackLight LCD Monitor 300 cd/m2 DCR 1,000,000:1 (1,000:1)
http://www.asrock.com/mb/overview.asp?Model=Z68%20Extreme7%20Gen3 <----- a better look at that board
http://www.asrock.com/microsite/PCIe3/ <----- PCI-E 3.0
http://www.tweaktown.com/reviews/4272/asrock_z68_extreme7_gen3_intel_z68_motherboard_review/index.html <----- review of that board
http://www.tomshardware.com/reviews/radeon-geforce-stutter-crossfire,2995.html <----- review done here on toms showing boards like the one above with the NF200 Bridge (dual cards @ x16 & x16) help to reduce micro stutter