First time build desktop need opinions please!! please reply!!

I'm building my first desktop and have yet to get any replies on 3 other posts and it's killing me If you guys could give me a build that would be cool and I don't want ADM I want an INTEL i5-2500k (I might overclock in the future) but everything else I'm open for suggestions. Thanks.

MOBO: ASRock Z68 Extreme3 Gen3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
CPU: Intel Core i5-2500K Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core Desktop Processor Intel HD Graphics 3000 BX80623I52500K
RAM:Team Elite 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory Model TED38192M1333HC9DC
GPU:Antec NEO ECO 620C 620W Continuous Power ATX12V v2.3 / EPS12V 80 PLUS Certified Active PFC Power Supply
PSU:SAPPHIRE 100314-3L Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
HDD:Seagate Barracuda ST500DM002 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
CASE:COOLER MASTER HAF 912 RC-912-KKN1 Black SECC/ ABS Plastic ATX Mid Tower Computer Case
DVD-RW:ASUS 24X DVD Burner - Bulk 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM Black SATA Model DRW-24B1ST/BLK/B/AS - OEM
OS: Microsoft Windows 7 Home Premium SP1 64-bit - OEM
cooler: COOLER MASTER Hyper 212 EVO RR-212E-20PK-R2 -- Thanks taking any opinions and suggestions and please!! help me find a better looking case I really dislike that one and if you do find one can you please see if it's easy to install because this will be my first time building a desktop(as i wrote in the title), Thank you again!

Change the ram to g-skill or corsair. A little too much info you have there

MOBO: ASRock Z68 Extreme3 Gen3
CPU: Intel Core i5-2500K
RAM:Team Elite 8GB (2 x 4GB) 240-Pin DDR3
PSU:Antec NEO ECO 620C 620W Continuous Power
GPU:SAPPHIRE 100314-3L Radeon HD 6870 1GB
HDD:Seagate Barracuda ST500DM002 500GB
CASE:COOLER MASTER HAF 912 RC-912-KKN1 Black SECC
DVD-RW:ASUS 24X DVD Burner - Model DRW-24B1ST/BLK/B/AS - OEM
OS: Microsoft Windows 7 Home Premium SP1 64-bit - OEM
cooler: COOLER MASTER Hyper 212 EVO

You have an atx motherboard so any atx case will work. I'm not too familiar with what case is best. Someone else can hopefully answer that